We all know that there are many repositories and marketplaces for 3D models on the internet. The specific problem I have now is with this 3D asset for sale on a site. It was made for sale a short while ago. The same model is available at another place for free under a CC license, and was first uploaded years ago. Furthermore, the same 3D model was made available for download for free under a personal use license at another place even earlier, about 6 years ago.
My problem is I don't know who to complain to or which person I should complain about. Normally my gut reaction when I see this sort of stuff is that the paid product has made its way around and been made available for free by someone. However it could easily be the other way around. The seller most who most recently uploaded the model looks suspicious. There is hardly any information that would reflect their knowledge of the actual model. Anyone who's done modelling of real objects before will know the extensive references one must use to make an accurate model
At least one person is in breach of copyright, and most likely the code of conduct on their respective site.
If for example the original author is Person 1, then Person 2 selling the model is breaching this license, because it's a non-commercial license. If on the other hand the original author is Person 3, then Person 2 may sell the model, but they need to fulfill the attribution requirement, which they haven't. If however the original author is Person 2 (the person selling the model), then the other two are in breach of the license.
Most likely the model (which appeared in 2013) is proprietary and copyrighted content and all three are in fact in violation of copyright (well, that's what I think is most likely). The asset may be ripped from a AAA commercial game, as was the case with a model I found recently which came from an ARMA military game.
I don't who to complain to or who to complain about. I thought someone could point me in the direction of the best way to go about this, as I think this community has some experience in handling 3D assets and licenses, and many of you who are in the industry or are experienced with this sort of misconduct might know the best way to approach this.