This may be targetted but saw in my Amazon account.
Code - DISCOVER20
Here are the instructions -
Input promotional code DISCOVER20 at checkout
Receive $20 off your order.
This is a limited time offer. The promotion will end at the earlier of 11:59PM Pacific Daylight Time, December, 31, 2019, or the time at which 250,000 customers have redeemed the offer. The promotion code will expire concurrently. Amazon reserves the right to cancel or modify this offer at any time. Offer applies to first-time Prime Now customer orders where an eligible Discover Card is used for the purchase and the promotion code is entered at checkout. Your order must either (1) be at least $20 or (2) meet the minimum order amount in your delivery area, whichever is greater. Taxes, tips, and delivery fees do not apply when determining minimum order amount. The maximum benefit you may receive from this offer is $20. Offer does not apply to digital content, alcohol, Amazon.com Gift Cards or to orders placed through voice shopping using Alexa, Amazon.com or any Amazon mobile application other than Prime Now. Offer available to Amazon Prime Members and only applies to products purchased through Prime Now that are sold and shipped by the Amazon store. Products sold by third party sellers that are available on Prime Now do not qualify for this promotion. Items must be purchased in a single order and shipped at the same speed to a single address. Delivery fees and taxes may apply to discounted and free promotional items. Offer limited to one per customer, account, and eligible Discover Card. Offer available only to new Amazon Prime Now customers who have an Amazon.com account which has been active for 30 days or longer and who are Card Members or authorized users of a Discover Card which is eligible for Cashback Bonuses and was issued in the United States. Offer may not be combined with other offers. Offer is available by invitation only, is non-transferable, is not redeemable for cash, and may not be resold. Offer discount will be allocated proportionally among all items in your original order purchased using the promotion code. 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 $20. 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 card amount. If you violate any of these terms, the offer will be invalid.