5.7.4 Where a Sign-Up Bonus has been granted to you, subject to you being required to have met all wagering requirements, you will be limited to a maximum withdrawal value of 6 times your first deposit amount and any remaining balance will be forfeited. This clause will only be applied at the discretion of casino management. All progressive wins are exempt from this clause
And then there's this;
The Sign-Up Bonus granted to you must be played through 100 times (100 X) before you will be able to withdraw any winnings made using the bonus money portion of your balance. ("Play through Requirement"). For example, if you deposit 100 and receive a 100 credit bonus, the Play through Requirement will be 100 x 100 = 10000. Any winnings attributed to the Cash portion of your balance can be withdrawn at any time, subject to meeting all of these terms and conditions
And although I couldn't find it, they also have another rule which isn't listed on their T&Cs. Basically for any winnings you get, a certain portion is allocated to your Bonus balance and must be wagered 100 times. How much gets allocated to the bonus balance depends on the proportion of your bonus funds to your cash funds. Ex. You play BDBA and you have $100 CASH and $100 BONUS....If you win $1000 off of any wager, then $500 gets allocated to your BONUS balance because 50% of your money is bonus money!