BeFrugal has increased cash back rates for American Express business gift cards to 2%. The next best rate is 1.5%.
If you don’t already have a BeFrugal 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)
- Do not pay with Citibank credit cards since they sometimes charge cash advance fees.
Please see the The Complete Guide to Amex Gift Cards.