I just wanted to put it out there that the casino site 4grinz.com has a ridiculous withdrawn requirement of having to rollover your deposit 3x before they will let you cash out. I'm not even talking about any kind of deposit match bonus, this is just for regular deposits.
Per their terms and conditions -
3.3 Withdrawals from your Account.
3.3.1 Withdrawals will be made from your stated bitcoin wallet address. Before any bitcoins which have been deposited into your Account can be withdrawn, the blockchain from which you made the deposit must provide us with a minimum of six confirmations of your deposit. The value of your deposit must be wagered a minimum of three times before eligible for withdrawal.
Consider this information before you make any deposit with them.