casino doesn't allow the user to deposit and withdraw their coin without wagering the deposit 'X' times (X= 1, 2, 3, ...,10, ...)
Bet 1% of your bankroll 300 times and at the end you'll have 3x rollover and your original deposit minus house edge, give or take some variance, not too different from mixing with variable fees/donations.
I hope this doesn't get me banned.