Amazon Prime Members will receive a FREE $10 Amazon Credit when they buy $50 in Amazon Gift Cards. Either click the button on the linked page or enter the code GCPRIME16 at checkout. Both emailed gift cards and physical gift cards qualify for this promotion. Of course, you can apply the purchased gift cards to your own account if you just want to get in on the free $10 credit. You will see a message during checkout letting you know the promotion is being applied. This offer is valid today only.