We have recently found out that Sketchfab.com is not a recommended place to put your 3D content.
A word of advice and perhaps a stern warning is that if you put your artworks or any model on sketchfab...
It will probably get stolen (right out of the window) and then re-uploaded to other sites like cgmodel.com,
and other marketplaces like Reallusion, Unity3d and Unreal.
Sketchfab likes to pretend that they are protecting your art, but they're not. (they are actually letting pirates steal the content)
The 3D display window they employed has 0 security and thieves and pirates have been stealing all the content from Sketchfab all along.
So please heed this word of advise, Dont put your artwork or models on Sketchfab. IT WILL GET STOLEN then RESOLD!
Please see this review on Trustpilot if you dont believe me. https://www.trustpilot.com/reviews/60aeeabef9f4870a94ae3610
Thanks and Cheers from Truebones Motions Animation Studios. http://www.truebones.com