Not sure why my why matters, but...
I can't use my seapass because it'll be attached to someone else's credit card. Without discussing the amounts I like to gamble with, I rather not travel with the cash. The fees it'll cost me to do ATM withdrawals would be a very large sum. Oh... And for personal reasons I don't do casino credit. So seems like the most sensible option, unless you know another means I haven't considered.