paypal 100% however if you do it to many times on paypal, paypal notices and notifies you to stop or they might proceed with legal actions or somthing, i dont remember the exact wording. i had 50~+ recalls in a few months
A lot of CC's have a 60-day policy.
CCs are "unsecured" debt meaning that if you choose not to pay it, they can only complain to a credit agency but they can't get the money from you. So they're more likely to work with you, refund your money and take the funds back from the vendor that charged you, i.e. Blizzard.
Should've put that in the OP.im talking about through paypal