I just got a very similar card, only the logos were Delta and Southwest, and it was to celebrate their 36th year. The card is very professional looking, and it even has my real name on it, but the offer just isn't believable. I'm not even going to call the number. It's disturbing to be seeing scams like this showing up in regular mail! Unlike email spam, making and sending these cards cost real money, so whoever did it must be expecting to extract serious money from anyone who responds.