Gah!

So someone has acquired my debit card number, and used it to buy and subscribe to some product through Sony Online Entertainment, the operators of several MMOGs. Needless to say the card has been canceled and fraud report entered. Significantly annoying. I'm curious whether this person is trying to play for his own enjoyment, or if there is some way for him to sell the account? I've been thinking back at whoever has handled my card lately, to see if anything suspicious pops up, but nothing comes to mind.