There are more players who play for fun than play for profit. But even the funsters realize that at the lower levels of play money poker, there is no rhyme or reason.
For those of us that have waded thru the muck, and emerged with play money bankrolls capable of playing the highest levels of play money games, we realize that the poker at those highest levels is just about the same as any real money scenarios. With no real risk.
Real money only players will say BS! (loudly). They want your real money. And they usually get it. They will tell you there is nothing to be gained from Play Money Poker. Again, they don't think playing for the enjoyment of the game has any value. That is like saying that watching a movie on TV is useless. Just pay your bucks and go to a theater.
There are a few situations about poker that play money games can not prepare anyone for. These are all centered on the scared money aspects of the game. Funny thing tho, that scared money thing is something that should never be learned. And it is a learned reaction. Anytime you are playing any hand of poker you need to be fearless. Not stupid, but fearless. You still need to know the
odds, and when to ignore them.
But you need to be having fun, win or lose. Many folks don't want to invest real money, they just want to be playing the game.