Update 11/26/18: This looks to be a targeted offer, so not everyone who has a Membership Rewards earning Amex card added to their Amazon account as a payment method will qualify.

Amazon is offering 20% off purchases sold by Amazon, in addition to various gift cards not sold by Amazon, for those apply at least 1 Membership Rewards point to their order and pay with the Amex card that earned it. The maximum discount is $100 on a $500 order.

1. Navigate here and click the “Click to activate” button to apply the offer to your Amazon account.

2.