Chances are they wont have a problem with that (or throw in a free repair if you have to).
Everyone who buys a car will look through the glove box and will likely keep the card.
Hopefully you are the first person they call when they get a chip

BTW, I just paid $140 For 5000 cards,I believe business cards are the cheapest form of (paid) advertising... 2.8 cents a piece,throw them in the air like confetti
