My wife and I each have this card, and we each got the mailer. But the eligible purchases are different.

Hers says in footnote #1 that the bonus comes if you meet the requirements specified, of which there are none that I can see, even online.

Mine says the "This bonus offer only applies to net purchases made with your credit card during the promotional period at merchants...:gas stations, grocery and specialty food stores, dining establishments, home improvement stores and hardware stores. ..not eligible...superstores, warehouse clubs, discount stores, and their affiliates."

Not too interesting on the latter.

Same 20K limit on both.