No iTunes money...yet I still bought an Application for about 8 bucks?

Question

I only had about a dollar left in iTunes cash, and I hit "Buy" just for fun on this 8 dollar application.

Next thing I know it downloaded the Application for my iPod Touch, and now I have it. D:

What's that all about? Does anyone have any idea?

Answer 1

That is weird. If you have a credit card on your account, they'll definitely charge that. If not...let me know how that turns out ;)

Answer 2

if you registered a credit card on iTunes it will automatically charge it once your giftcard runs out