There are three basic historical changes in Christianity surfacing in the past century in the USA that have become largely accepted as Biblical truth among those who consider themselves historically orthodox, Fundamentalist.  And these changes are purely the work of demons in these latter days.

(1) Redefinition of ALL Doctrinal Terms by teaching a type of Biblical interpretation, "Hermeneutics," that is manifestly irrational and demonic, that is universally taught today.  This means of interpretation supports all forms of false teachings of scripture, and particularly a Gnostic form of eternal security of "grace," regardless of whatever anyone believes or does. Anyone that thinks that faith=believe=trust=confidence, or even =repentance, is an extremely Biblically blinded person.  See "repentance,"  Biblical "believing" (pisteuo) is committing obedience to orders of Jesus Christ as Lord, not simply some mental notation.  And to say that a person's believing (mental notation), trusting, or confidence is the same as faith is pure Pelagianism condemned in 418 and 431 AD, saying that man, himself, by his own mind and efforts may please God and obtain Heaven.  Very few people know what Biblical "faith"  is today.   See links.

(2) Dispensationalism, a totally new means of salvation, since 1900 in USA, with massive changes in ALL doctrines, without Lordship of Christ (therefore, a cult), Unconditional Eternal Security of even totally carnal people (since 1918), two classes of Christians restoring forms of ancient Gnosticism all based upon "grace," regardless of beliefs or continued sinning, and a pretribulation rapture that "this church" will experience no persecution by the antichrist for their beliefs [undoubtedly true].

If mankind can be brought to believe that salvation is by their own mental notation of only a one-time mental affirmation of a wholehearted belief (trust), they falsely call their faith, in Christ as their Savior only, then all hell and its demons are their destiny forever (Matt 7:21-23).  They are totally deceived by the satan, the god of this world.

These same Dispensational "grace" regardless or the Free Grace teachers always make a great furor over the concept of rewards given in Heaven.   This is the only way they have of referencing any works as meritorious, or any excuse for sinful living while still going to Heaven.  They say they are saved by grace alone, and their faith (trust) alone, and NOT by works of any kind.   But they have no understanding of grace nor works nor faith nor believing no repentance nor anything applying to salvation.  They are blinded Pharisees, who "shall in no case enter into the Kingdom of Heaven" (Matt 5:20). 

They say that they are all uncondtionally destined to heaven, after a one-time trust in a Savior only (not Lordship; therefore a cult by definition).   So, they say, there is no place whatsoever for works in salvation, unless, their self-conceived "good" works follow them for rewards to them after in Heaven.   So rewards for works is their great and only reason for any working at all, since all get into Heaven without any works or beliefs or morals or commitments at all; "without any concern for having to please God," they teach.  "Isn't it wonderful we don't have to be good," they teach.  

All you who base your sinful living, saying that you are saved by "grace alone" through your own trust (faith) in Jesus as your Savior, regardless of anything else, will not be alone in an Eternal hell.  About 98% of the religious world today will be there with you and all your pastors and teachers, who have filled this country with a false gospel for the past 90 years.

You are so wrong, it would be be extremely laughable if acted out on a stage, but your very false understandings are sending you and those who follow you all to a fiery Eternal hell.  And this is very regrettable and grievously sad.  "We pray you, Flee from the wrath to come!!"

Explanation:

1.  Our salvation and the salvation of ALL peoples (born-from-above or unbelievers worldwide) is judged upon the basis of any WORKS done by obedience to THE FOUNDATION LAID (1 COR 3:11-12). THE indwelling Mind of Jesus Christ our Creator IS FAITH, received after we repented and committed to His Lordship in our living in Restored Fellowship as Sons of God (Rom 8:14, 16), while still on earth.   He died on the cross to make it possible to become the FOUNDATION (Rock) of our RESTORATION (At-one-ment) and our living in obedience to His indwelling faith.   Plain and simple.    See concise and complete explanation under heading, "Our Final Eternal Judgment," in articles, Judgment, Good vs. Evil/Sin and  Justificatiion-Teachings Today.

2.  There are no rewards (plural) in scripture.  All reward is singular only IN NT when referring to anything of the saints in Heaven or salvation or merit.  There is not "rewards" (plural word) in the entire NT. Indeed, all the places of "rewards" in the OT is coming or relating to the lost only.   There is no such thing in scripture relating to "rewards" (plural) in Heaven in scripture.

1 Cor 3:11-15 is so often used by the "grace" regardless as their stomping ground for speaking of works, and how they will go to Heaven "regardless."  But notice: verse 13 says, "Everyman's work shall be made manifest....it shall be revealed by fire....."  And verse 15 says, "If any man's work shall be burned, he shall suffer loss; but he himself shall be saved ; yet so as through (dia) fire."

First, none of this section in first Corinthians mentions works (plural) or rewards (plural), secondly, verse 11 at the starts says, "For other foundation can no man lay than that is laid, which is Jesus Christ, NOW IF ANY MAN BUILD UPON THIS FOUNDATION..."

1 Cor 3:6-9 says that God gives the increase, to our labors....verse 9, that "we are fellow workers of God, we are a building of God."  As though we are fellows under the same yoke WITH CHRIST (Matt 11:29) and THE FATHER has the reigns (Jn 14:10).  Only "the work" done by the Father (Jn 14:10) through us, with us as yoke fellows with Christ (Jn 20:21, Matt 11:29)), is counted.  But one must understand what Christ's indwelling faith is, and what grace is, and what prayer is (as starters) to fully understand this.  Otherwise, you will remain blinded by the satan of this world system.

If any man is born-from-above, he is building then upon the Foundation Christ... a man must labor according to that which cannot be burned (the Truth teachings, doctrines of Christ, Lord Jesus Christ Himself in us).....and it is God the Father that gives the increase.  So we may conclude that a man's labor according to Christ's doctrines is important.  But "God does not reward his servants according to the success of their labour, because that depends on Himself; but His reward for them is according to their faithful labour with Him which they bestow on His work" (Adam Clark), and His leading them as their Shepherd.   

In other words, is a person born-from-above and desparately wanting to be obedient to the Holy Spirit of Lord Jesus Christ inside himself; being yoked to Jesus Christ indwelling him, praying and looking only and always to your Father in Heaven??  Child Simple.  There is no other Foundation laid, but that is now laid by Christ.  A man receives reward of the inheritance, despite possibly no outward appearance of worldly success.  He has the Foundation, just perhaps like the thief on the cross, or an obedient and faithful missionary.

Also, it may be that someone has (1) based their efforts according to the Truth teachings of Christ, and (2) been obedient through the Mind of Christ in himself to His Heavenly Father, is worthy of Heaven as his reward (singular). 
A.  But he may terribly backslide into sinning losing all possibility of reward, Heaven (see Ezek 18 and 28, Heb 10), but deeply repents and recommits to Christ's Lordship and dies.  Could he be "saved, yet so as by fire" ?  Or,
B.  if one is born-from-above starting on the proper Foundatiion, and died before he could have any labor in obedience to Christ, like the thief on the cross alongside Jesus, "saved, yet so as by fire."

Therefore, despite the ubiquitous and scripturally unfounded assertions of the "grace" regardless, it could be that "reward" spoken of in scripture is actually salvation itself. (in Greek translation there is no "a", it is not specifically "a" reward, it is just "reward.")

"Servants, obey in all things your masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God:
And whatsoever ye do, do it heartily, as to the Lord, and not unto men;
Knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ" (Col 3:22-25).   No carnal christians even considered.

"For other foundation can no man lay than that is laid, which is Jesus Christ.
Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;
Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is.
If any man's work abide which he hath built thereupon, he shall receive reward" (1 Cor 3:11-14).  Built, led by the Holy Spirit of Christ in them, the Foundation already laid.

"And, behold, I come quickly; and my reward (singular) is with Me, to give every man according as his work (singular) shall be" (Rev 22:12).  This is the Final  Judgment-Good vs. evil/sin, for Eternal Heaven or hell .

"For the Son of man shall come in the glory of His Father with His angels; and then He shall reward (singular) every man according to His work (singular)" (Matt 16:27-28).

And the scriptures clearly teach in multitudes of references ( Judgment, Good vs. Evil/Sin ) that the Eternity of all people, saved or unsaved, is based upon one impartial measure (Rom 2:5-11).  "What are your deeds or works (Matt 7:19-24, "ye that work lawlessness"), God-directed (agathos, God-good) good works -OR-  self-directed dead works (Matt 7:19-24)?"  Child simple.  "Keep thy heart with all diligence: for out of it are the issues of Life" (Prov 4:23).  "Shall not God search this out? For He knoweth the secrets of the heart" (Prov 44:21).

This means of our Lord's Final Judgment is so simple, it is profound.  This eliminates all nuances of those of cults (no Lordshiip of Christ), false doctrines of all kinds, all works of tainted self interests and/or pride; and it eliminates all those given to immorality and mysticisms of all types; and all backsliding loses; and considers all new starts.  Final Judgment is based only upon, "Do you have any building remaining upon the Foundation (Rock) of Lord Jesus Christ?"  Only those works done through the leading, empowerment of the indwelling Holy Spirit (ye MUST be born-from-above), with a heart continuously devoted to the Truth of God ONLY will get into Heaven.   And this may be regardless of any outward sign of any works at all seen in the world system.  It is God that gives the increase, knowing our motives, in His Perfect Wisdom and Knowledge.  See Matt 20:1-16, concerning the workers in the vineyard.

(3) Ecumenicalism, a deliberate choice to disregard sinful behavior or doctrinal differences of individuals as having NO significance to "Christian" fellowship or salvation."   This doctrinal neutrality, being against anything as exclusive Truth, was formally declared as principle in 1948, and is the practice and belief of all Ecumenicals today.  Compromise is the name, deductive thinking is the game.

[[  Fundamentalism is simply the holding to the fundamentals of what makes something what it is.  In Christianity, Historic Fundamentalism is simply holding to those Biblical teachings of Christ and His Apostles that makes true Christianity what it is.   Anything else is not Christianity.  ]]

Ecumenical propagandists, today, by their dedication to "loving" compromise in all things, are deceitfully and forcibly redefining any and all dissenting religious groups as Fundamentalists, lumping them all together as "radically antisocial, anti-liberty, anti-intellectual, anti-loving, and equivalent to modern terrorists."  This is a manifest blasphemous lie against Historic Apostolic Doctrines of Christ.   

We are NOW in "the latter days".   We (Christians, conservatives, fundamentalists) are routinely called fascists, bigots, the Taliban, and veiled threats of violence are not uncommon.  Christians WAKE  UP ! 

"Take heed unto thyself, and unto the DOCTRINE; continue in them: for in doing this thou shalt both save thyself, and them that hear thee" (1 Tim 4:16).

"My people are destroyed for lack of knowledge: because thou hast rejected knowledge, I will also reject thee" (Hosea 4:6).

"A people who do not understand will fall" (Hosea 4:14).
 
"For I desire mercy and not sacrifice, and the knowledge of God more than burnt offerings" (Hosea 6:6).

 "Behold, to obey is better than sacrifice, and to hearken than the fat of rams" (1 Sam 15:22).
  
"Woe unto you, when all men shall speak well of you for so did their fathers to the false prophets" (Luke 6:26).

"Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather DIVISION" (Luke 12:51).