You will know these false prophets/profits by their works and proclamations.
God never intended the gospel to be commercialized, not in biblical times either $$$
Defining The False Prophet And Their Fate:
Deu 18:20 But the prophet, which shall presume to speak a word in my name, which I have not commanded him to speak, or that shall speak in the name of other gods, even that prophet shall die.
Deu 18:21 And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?
Deu 18:22 When a prophet speaketh in the name of the LORD, if the thing follow not, nor come to pass, that is the thing which the LORD hath not spoken, but the prophet hath spoken it presumptuously: thou shalt not be afraid of him.
Jer 23:14 I have seen also in the prophets of Jerusalem an horrible thing: they commit adultery, and walk in lies: they strengthen also the hands of evildoers, that none doth return from his wickedness: they are all of them unto me as Sodom, and the inhabitants thereof as Gomorrah.
The Motivation of the False Prophet Is Money:
Micah 3:9 [NIV] Hear this, you leaders of the house of Jacob, you rulers of the house of Israel, who despise justice and distort all that is right;
Micah 3:10 [NIV] who build Zion with bloodshed, and Jerusalem with wickedness.
Micah 3:11 [NIV] Her leaders judge for a bribe, her priests teach for a price, and her prophets tell fortunes for money. Yet they lean upon the LORD and say, "Is not the LORD among us? No disaster will come upon us."
Micah 3:12 [NIV] Therefore because of you, Zion will be plowed like a field, Jerusalem will become a heap of rubble, the temple hill a mound overgrown with thickets.
Jer 6:13 For from the least of them even unto the greatest of them every one is given to covetousness; and from the prophet even unto the priest every one dealeth falsely.
Jer 6:14 They have healed also the hurt of the daughter of my people slightly, saying, Peace, peace; when there is no peace.
Jer 6:15 Were they ashamed when they had committed abomination? nay, they were not at all ashamed, neither could they blush: therefore they shall fall among them that fall: at the time that I visit them they shall be cast down, saith the LORD.
Ezek 22:25 There is a conspiracy of her prophets in the midst thereof, like a roaring lion ravening the prey; they have devoured souls; they have taken the treasure and precious things; they have made her many widows in the midst thereof.
Ezek 22:26 Her priests have violated my law, and have profaned mine holy things: they have put no difference between the holy and profane, neither have they showed difference between the unclean and the clean, and have hid their eyes from my sabbaths, and I am profaned among them.
Ezek 22:27 Her princes in the midst thereof are like wolves ravening the prey, to shed blood, and to destroy souls, to get dishonest gain.
Ezek 22:28 And her prophets have daubed them with untempered mortar, seeing vanity, and divining lies unto them, saying, Thus saith the Lord GOD, when the LORD hath not spoken.