Amazon has for Prime Members: Purchase $100 Google Play Gift Card (Physical), Get $10 Amazon Promo Credit when you click redeem on the product page or apply promo code GPLAY at checkout. Shipping is free.

Amazon has for Prime Members: Purchase $100 in Google Play Gift Cards (Email or Text Delivery), Get $10 Amazon Promo Credit when you click redeem on the product page or apply promo code GOOGLEPLAY at checkout.

Note: The offer on the product page for the digital gift card says $5 credit on a $50 purchase, but this appears to be incorrect. The code seems to require a $100+ order total.

Confirm a similar message shows at checkout after applying code: "One per account. Purchase USD 100.00 or more in Google gift cards, get a $10 Promotional Credit towards your next eligible purchase."

Thanks to community member Undisclosed for finding this deal.