US Copyright law gives full legal rights of commercial content creation of a brand / franchise to the owner of the brand / franchise, except under the very limited clause of fair use (which mostly concerns parody or substantially useful commentary). So for example, under US law, Disney can sue you for selling a 3d model of a light saber, if you did it without their permission and without seeking a license from them. I think Disney specifically hasn't been cracking down on that, especially because the Star Wars rights have only been with Disney for a few years, but they may double down on that at any time. You can't argue with US law. I agree it sucks, but the only way to change it is to fight it in court to change the law. This is not the fault of cgtrader. You should haver known your legal rights going into it. Ford is not the only one - you better believe the NFL is like a rabid dog when it comes to cracking down on unlicensed commercial use of their brand / franchise. You are supposed to create a generic car model without branding it specifically. It can be close enough to the car you specifically want to model, just tweak it till it is different enough that they can't claim it is their specific car. Then you can sell that model on cgtrader!