Ferrari can only enforce those terms by refusing to sell you any more cars, though. There's not much they can do beyond that.

GM also comes to mind, where they void the warranty if you flip your new Z06 or ZR1 within 6 months. It's nothing more or less than an encumbrance on the title, and they shouldn't be able to demand that without consideration in the form of a discount. But they can, because they have monopoly power in that particular niche.

Key point is that Ferrari and Corvette are niche markets. Car customers in general wouldn't put up with it, because there's plenty of competition for their business.