im gonna go blow the money in AC at the craps table.
Recently, we have detected an increase in invalid clicks on Facebook. Your account was impacted and as a result, we are crediting your account. Your credit has been automatically deposited into your Facebook account and will apply toward future advertising campaigns. Your credits expire December 15, 2009.
Yeah, mine was already just subtracted from yesterday's final balance.I think also they're not applying the credit directly to your credit card, they're crediting your FB account and therefore you must use your credits on ads:
Much good that credit did me, they just disabled both my accounts.