It's obviously more impactful for real money websites, but realizing that two people mean different things by the same statement is pretty common. I think even fake money prediction markets are much more interesting if you largely avoid that.
I've played plenty of both and it really is just as annoying with play money if the rules of the game are flawed. It just feels like cheating if a loose interpretation of the rules let's people off the hook for a bad prediction.
