Originally Posted by Stripe

It's crazy that they can send the luggage tags and straps, which I always throw away, but can't send a physical card. Not sure what I'd do with the card these days but (1) I like the "security" of having it in case I'm at some distant station and there is some question about my status and (2) I keep a collection of the cards.

I do keep the "good job" certs and try to give them away but my rule is that a credit card announcement on the flight makes the crew ineligible to receive one.