Amazon is gearing up for Prime Day deals later this month and to generate excitement, they are offering a great promotion right now. I believe this is only for Prime members.
If you purchase $40 in Amazon gift cards (send to yourself, a friend, Dad etc..) and get $10 back in credits to use on a future purchase.
I am all over this because we shop Amazon all the time. You need to purchase the Amazon Mini Envelope Prime Tin card to be mailed or the Prime Day egift card or the print at home card and use code: GIFTFORPD21 at checkout.
Once I clicked to add the promo code to my account and selected the Prime Day email version card, I went to check out and this is the confirmation message you should see: