For today only (7/23/15), Top Cashback is offering 2.25% cashback on the purchase of Amex Business gift cards.
If you don’t already have a TopCashBack account, you can find a signup link and many other cool things here.
- Do not use a promo code to reduce gift card fees or for free shipping since that will invalidate your cash back (the Premium Shipping Plan is fine, though).
- Do not buy denominations higher than $2,000 (see: $2K denomination limit on Amex gift card cash back)
Please see the The Complete Guide to Amex Gift Cards.