Amex Cardholders Get Up to $50 Off Amazon Order

Amazon is offering 20% off purchases sold by Amazon, in addition to various gift cards not sold by Amazon, for those that apply at least 1 Membership Rewards point to their order and pay with the Amex card that earned it. The maximum discount is $50 on a $250 order. Note that while widely available, it does appear that this is a targeted offer.