Amazon has a current offer with American Express (Amex) where Amex Membership Rewards Card Holders can get 20% off up to a max of $50. To get the max $50 discount, your total purchase before taxes needs to be at least $250.
- Link Amex card to your Amazon account: https://www.amazon.com/gp/shopwithpoints/marketing.html?inc=swpamex&pr=swpamex
- Activate promotion: https://www.amazon.com/b?node=20905260011
- Use at least 1 Amex Membership Reward point i.e. $0.01 (see screenshot below)
- Pay with your Amex card