At CardCash, users can take gift cards from other stores and exchange them for Amazon Gift Cards. (The exchange is not a 1:1 rate. Your Amazon gift card amount will vary depending on the card you're exchanging.) Just enter in the merchant name and the gift card balance for a quick exchange offer. If you choose to accept the offer, submit the required info and your Amazon gift card will be emailed to you in a printable format once your order has been approved. (Approval can take up to one business day.)