it's so much easier to see if you can hack it betting in mma than poker, because in mma you can "pretend play" for real. also, you're always going up against the market, not individual players.
in poker, playing without real money is never the same as playing with real money. plus, playing with low limits is going to be inherently different (because of the skill of the players) than playing with higher limits.
in poker, playing without real money is never the same as playing with real money. plus, playing with low limits is going to be inherently different (because of the skill of the players) than playing with higher limits.