No doubt. But they're likely to get plenty of Teslas on the road in the meantime, which is all they need: awareness that Tesla exists, and (theoretically) satisfied customers.

Presumably Musk is anticipating that most buyers will like the Model S enough to not sell it back; if reality lines up, Tesla comes out far ahead. If not, they're doomed, but this scheme would really only be accelerating their demise in that case.