Edited December 3, 2016
at 08:50 AM
Amex rewards points gives $25 off a $50 or more purchase
1. Add $50 or more of eligible products sold and shipped by Amazon.com to your shopping cart.
2. Under "Choose a payment method," select your Membership Rewards eligible American Express Card and pay for at least a portion of your order with Membership Rewards points, then click "Use this payment method."
3. Enter the promo code AMEX16EVER in the box provided on the checkout page, then click "Apply."
4. Up to $25 of savings will be reflected on the final order checkout page.
>Full terms and conditions
Edit: added YMMV to title as some are reporting they don't qualify for this.