Every day I see flyers stuck under windshield wipers in cars parked along the street. I don't know why, but I've been collecting them for over a year now. A slice of Paris life.
I have no knowledge of or vested interest in the establishments advertised in these flyers.

It would be nice, I think, to have all cars named Monet, Degas, Da Vinci, Botticelli... the possiblities are endless.

Gratuit, of course, means "free" or "given." I like to think of all the other words that come from the Latin gratis: gratuity, gratuitous, congratulations, ingrate.
Not the same as libre, which means "free" as in available or unconstrained: as in liberty, liberate, and so forth.