I used a debit card for my offer, not sure about the prepaid one though.
I myself recommend the video professor offer if its still there. Its the only offer I found that doesn't try to charge you for other fees. Its just a one time payment (of like $5.75 or something) and you get a disc of your choosing, and it comes with a wireless mouse, a set of headphones, and 2 windows programs. (I got windows media recorder and some organizer)
Also....
Falcon Baaaummp!