The 99 slot machines and all sister casinos are all crooks. They never payout any winning tied you with hidden rules. If you win valid they never respond on your withdrawal. It should be stopped. I have bad experience with three times to 99 slotmachines and started realized the sister casinos like, mighty slots, real vegas, slot nuts, slot inferno and plenty jackpots are also the same cheat like 99 slot machines. Plenty Jackpots also never payout. My withdrawal is more than one month and still no sign.