Heads up, I just got this e-mail from Amazon:
Enjoy this exclusive Gift Cards offer:
Send at least $50 in Amazon.com Gift Cards by text message and in a single order by December 22, 2019, and receive a $5 promotional credit automatically applied to your account after the qualifying gift card has been sent via text message.
An email notification will also be sent within three (3) days after the gift card is sent by text message, confirming your Amazon.com Promotional Credit.
Enter SMS2019 at checkout or click the button below to qualify
Important Notification: This offer is valid ONLY to eligible customers who are the recipient of this offer (either via email or on Amazon.com). Limit one promotional credit per Amazon.com account. Terms and Conditions apply; scroll down to learn more.