The prize slot of the tournament is terribly bad. Only the winner??? Mind you it will not encourage players to play. Me alone doubts that there's manipulation in here; that the funds will goes back to the organizer! If you want fair distribution and etc. give it the place winners.
I won two of them yesterday, so they're not rigged. But the way they pay out in Pokercoin is to manually send POKER to your wallet after the tournament, so I can see why they don't want to have multiple payouts. (Also, while there are 12-16 players registered, only three or four actually show up, so winner-take-all isn't unreasonable right now.) I agree that this should be fixed somehow but I understand why it's the way it is right now.
mBTC tournaments seem like they will work normally, though I have't seen one run.