Who said people don't like advertising? Throw in a cheap rental car, and people not only will love it, they will become your eager ad medium themselves. Springwise publishes a round-up on carvertising [sic] business around the world (read Europe and Australia). In a nutshell, people pay very low rents for their cars that are plastered with advertising if they drive enough miles in selected markets and make themselves visible.
-- via Cool Business Ideas
