hmm, so if in your pokerstars software there is no additional informations about this promotion, general withdrawal terms should be applicable - i use pokerstars.eu so it can differ from yours, i have stated something like that "cash deposited to your account, must be played in the game before withdrawal" (i translated it from my language). So it's like i wrote earlier - you have to play in games with overall buy-in's equal to the amount you deposited. If you play cash games (not tournaments) it's also good ofcourse. You can also ask pokerstars support about this, but it should be just like wrote.