I watched the rigged betting go down on monday morning and the bankroll was small enough that the site operators were definitely over half the bankroll.  ruru was probably around 100 then maybe another 25-50 btc from other users. Even if the tiny chance the bets were legit they were betting against themself. If they lost bets they would recieve the coins in their investment account, withdraw and try again. When you bet against yourself you can't lose.