Not sure but if you put the $500 credit on your sea pass card, you can go to the casino and take the money off your sea pass card (or you could in the past). Recently folks have said that you can load the money from your card onto a slot machine and then cash out and take the ticket to the cashier and get the money. Another way might be to go to the cashier and ask for the money off your card minus a certain percentage. Then you can take the money home and use it to pay your credit card.
Good Luck.
