Hum non les conditions generales d'utilisation sont clair la dessus, ce que tu met sur leur site reste ta propriete et ils n'ont pas le droit, sans te demander, de l'utiliser:

Anything you upload or post is yours. As such, you are responsible for it and anything bad that happens to you related to this content. Since we’ve already mentioned we can change or stop the Site at any time, please be sure you have backup copies. We’ll get to what you can and cannot post or upload in a moment.

What you’re allowing us to do on the Site: since you own your content, we need your permission to use it in whatever way we see fit on the Site, which is what’s allowed here. Make sure you truly do own it. So foreign law doesn’t complicate what’s already complicated with US Copyright law, you waive “Moral Rights”.
How the world can use your designs: outside of Thingiverse, you need to explain to others how they can use your content. You own it and the rights that attach so tell everyone how you will permit them to use it. One way to go is a Creative Commons License which, on the copyright spectrum, falls between “none” and “all”. Be advised: we may share your content with others. These “others” are supposed to follow your usage restrictions and we’ll tell them such. They may or may not listen. If they don’t, that’s between you and them; please don’t blame us.