While you may already receive special promotions for being a Costco or Amazon Prime member, you can increase savings by using one of the store's co-branded credit cards. Costco offers the Costco ...
If you're a frequent Amazon shopper, you might be considering one of Amazon's credit cards — or even already have one in your wallet. Either way, Chase, the cards' issuer, has some excellent news.
you'll find a discount code box that says "Add a gift card or promotion code or voucher." 6. Add your Amazon coupon code there, click Apply, and your total will change to reflect your discount.