Seems like this is working again, I have used this previously a month ago and I was able to add it to my account again. The only downside this time is that the 20% off does not work for gift cards, only items purchased through Amazon.
https://www.amazon.com/b/ref=as_l…uage
Redeem your promotional discount in 3 easy steps
"Activate now"
Click on the "Activate now" button to activate this promotion and apply points to your next order. You MUST click on the button to receive the promotion credit
Shop eligible products
Add one or more of eligible products sold and shipped by Amazon.com to your shopping cart. Promotion can be redeemed on multiple purchases. Maximum discount available is $50
Use Membership Rewards points at checkout
Membership Rewards points will be temporarily set as your payment method at checkout. To redeem this offer, you must use Membership Rewards points for at least a portion of your order.
20% savings will be reflected on the final order checkout page if the items in your order are eligible for the promotion
Terms and Conditions
- This is a limited time offer. This is a limited time offer. The promotion will end on the earlier of (a) 11:59 PT on 4/20/2020, or (b) the time at which 40,000 customers have redeemed the offer. The promotion button will expire concurrently.
- Amazon.com reserves the right to cancel or modify this offer at any time.
- Offer is available by invitation only, is non-transferable, is not redeemable for cash, and may not be resold.
- Offer applies only to the purchase where Membership Rewards points are used for at least a portion of the purchase and the promotion is applied at checkout.
- Offer only applies to products shipped and sold by Amazon.com. Products sold by third-party sellers or other Amazon entities will not qualify for this offer, even if they are "fulfilled by Amazon.com" or "Prime Eligible".
- Maximum benefit you may receive from this offer is $50 per eligible Membership Rewards enrolled card per one account
- Offer may not be combined with other offers.
- Shipping charges may apply to discounted promotional items.
- Offer does not apply to purchase of digital content.
- Offer discount will be allocated proportionally among all promotional items in your original order. If any of the items in your original order are subsequently returned, your refund will equal the original price of the product, less the proportional amount of the discount. The total discount on the unreturned amount of your original order will then be less than $50.
- If any of the products related to your original order are returned, subject to Amazon’s refund policy, you will receive a refund of the amount charged to your card first, followed by Membership Rewards points.
- Promotional codes (including those placed directly in accounts) may not be redeemed for Amazon Gift Cards.
- This promotion is available only to Amazon.com customers with an eligible Membership Rewards points card issued in United States.
- Promotional credit is applied before taxes and fees.
- If you violate any of these terms, the offer will be invalid.