Amazon gift cards at Bitrefill.com can be purchased with bitcoin and altcoins. Select a denomination, send the payment from your Bitcoin wallet to the address provided, then redeem the provided PIN code on Amazon. You can buy anything on Amazon using your credited account. Bitrefill currently offers Amazon Gift Cards in USA, UK, Germany, France, Italy, Spain, India, Japan, and China.
The redeeming Amazon account is required to have a second payment method added (Credit cards/Bank accounts).