Fine with me. Please keep us posted about the $5 credit.
So here's the update: bought one song and received an email saying that i will be receiving a $7.05 credit. I then bought 4 more songs on 4 more amex cards and I imagine i'll receive the same amount for each of those as well.
annoying part is that itunes doesn't let you associate more than 5 cc with a single account in any 30-day period. so to use my additional amex cards, i'll have to open another itunes account which is a pain in terms of transferring songs. anyone know if it's easy to transfer songs from one itunes account to another?