Amazon is running an early Prime Day promtion where Prime members can get a $10 credit when purchasing a $40 Amazon gift card. To qualify for this promotion, you must visit this page and click the yellow “Apply code to your account” button. Then buy either the Mini Prime Envelope Tin gift card or a Prime Day eGift Card costing $40 or more. You should see a message during checkout that says you qualify for the free $10 credit with the purchase. You will receive the $10 credit automatically applied to your account 2 days after placing your order. If you’re a frequent Amazon shopper and plan to spend this amount anyway, you can enter your own email address as the receipient to basically recieve the free $10 in exchange for loading up your Amazon credit balance by $40. This promotion ends June 20.