Just received this email from Amazon:
Thank you for purchasing 'Amazon eGift Card...' from Amazon.com. Your order has earned you a promotional credit which we have added to your account. This credit will be automatically applied to your next eligible order.
Additional information on this offer can be found here.
A $10 promotional credit has been applied to your account. The promotional credit is valid through November 29, 2020 and is good for eligible products sold by Amazon.com.
This credit will expire on November 29, 2020. For more information, please read our Terms and Conditions.
Thanks again for shopping with us.
Amazon.com