Find sites with certain types of deposit bonuses. Then, run the math on the playthrough requirement for those bonuses, using the amount you have to play multiplied by the ROI for the particular slots game. For example, let’s imagine a bonus where you deposit $1000 and get $1000 in bonus money, and then have a 30x rollover — this is usually 30x your bonus PLUS your deposit amount, so I’ll work with that model here. So that means that you have 30x$2000=$60000 in bets that you need to make before you’re allowed to withdraw.