$10 of Amazon credit toward Android apps for buying a $25 gift card

Amazon is giving away $10 in promotional credit (which expires July 15) toward Android apps for buying select gift cards starting at $20.  These generally ship free with Amazon Prime, and it's a good deal for those of you with Android phones and tablets.  Starbucks and Whole Foods gift cards start at $25, but you can also snag a $20 Domino's Pizza gift card to maximize the percentage discount.