I haven't seen these things in years.
My son has made about 20 flights and has never been offered one. Frankly, he's never even spoken to a pilot on any flight - they are too busy and are locked in the cockpit - not their fault. We were in a hotel and some DL pilots shared our elevator and one of them gave him a baseball card with details of an MD-88 on it. Nice gesture, but not the same as the wings.
I can remember seeing them as a kid and imagining you could fly if you had them. But that is back in teh days when if you had the sneakers with the red dot on the back it meant you could run faster. Kids these days have less imagination, and the shoes come with real flashing lights.