AFAIK, we're not expecting a "credit." Rather, we are expecting a physical gift card in the mail. And that physical GC should be applicable to any Amazon account.
That's great! I'm glad I have all those former AP accounts still open. I see lots of weddings in the future.
Edit: I just reread the 1st post in this thread.
You will receive your Amazon.com Gift Card via email from Amazon one to two weeks after registering.
GCs cannot be redeemed for purchases of gift cards. GCs cannot be ..... ..... or applied to any other account.
So I'll just wait and see. It's not too much work to try and get $20 Amazon.