This is what I got in late 2020 .....
Welcome to 3 Million Miler Status. You've earned it!
Congratulations on reaching Three Million MilerTM Status and being part of our most elite group of flyers. In recognition of your Million Miler achievement, we'll be sending you new bag tags that should be arriving in the next few weeks.

We are grateful for your continued loyalty to Delta, and, as a sign of our appreciation, you will continue to enjoy complimentary Gold Medallion® Status each year.

While we are also happy to offer you a choice of a premium gift, we have temporarily suspended the ability to select that gift. We know this is an important milestone and we are sorry you won’t get your gift right away, but we will contact you directly when it’s time to make your selection.

Congratulations again on this impressive achievement and thank you for your business.

2 years later I was given a $500 cert. Whatever.... Thanks for NOTHING!