For the next 6 days, Top Cashback is offering 3% cashback when you purchase American Express Gift Cards.
If you use your American Express Fidelity to pay, you will get 4.66% cashback on a $5,000 purchase of gift cards after all fees. That is pretty good.
I use AMEX Gift Cards for my everyday spending, unless I can get more than 4.66% cashback.
American Express is no longer fulfilling portal payouts when coupon codes are used, as has been publicized in the Blogosphere by Frequent Miler and Doctor of Credit, among others. However, when you don't use a promo code you will still get your cashback (confirmed myself).
Promo codes were great to take off the purchase fees or the shipping fees. Since you can buy $5,000 worth of American Express gift cards with just $8 in purchase fees and $9 in shipping fees, your total fees will come out to 0.34% of the total purchase price. While this is tragic, it is certainly not devastating and doesn't change my plans, American Express is just giving me as little less money than usual. I'm crying inside.
Remember that if you signed for a free shipping plan ($99 a year), the free shipping will not void your cashback.