I used a prepaid master card to pay for my World of Warcraft subscription. Now with this annual pass happening I want to know if I can use that credit card as a valid card to have on file to maintain my year subscription. I'm pretty sure it could work as long as it doesn't end up getting charged for money that isn't there. Now, I added a 60 day prepaid game card to my 1 month recurring subscription. My question is: Will it try to charge my credit card again when the month runs out even though I've added that game card? Probably an obvious answer but this year commitment thing is pretty touchy and I don't want to make any mistakes.