For me, I have been able to use all of the discover offer last year. During Nov and Dec I have used both $10 off $50 and 20% off order up to $50. This link appear again to me yesterday and it also worked for me as well. A wonderful start for the year.
As always, these offers are YMMV. Remember, you can always check back to see if you're targeted. Make sure to use some old tricks like add & re-add your Discover card and see if it's work as well. Good luck
Terms and Conditions
This is a limited time offer. The promotion will end on the earlier of (a) 11:59 PT on 3/31/2020, or (b) the time at which 80,000 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 of at least $50 of eligible products, where Cashback Bonus is 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 $10 per eligible Cashback Bonus 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 $10.
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 Cashback Bonus.
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 Cashback Bonus 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.