There are tons of people that pay to be on a waiting list. Prime example, people are paying 100,000+ just to get their names on the waiting list for the Ferrari 599, because they are sold out for two years and the only way to get one is to have a spot on the waiting list, or to buy a used one. And used ones are going for 150,000 over sticker.
True. A local Mitsu dealership is taking $500 deposits that will get you on a waiting list for the Evo X -- unfortunately, they're only getting three the first shipment.
The deposit is all in the dealership's hands in most cases, the automaker doesn't necessarily have control over those kind of deposits.
Smart, however, had a $99 deposit to reserve a car about a year before they officially released the car in the U.S.