As far as I know, Shinteo doesn’t authorize the use of his models for others to sell. A year back he pointed out others were selling his morphs on his patreon.
He is the only ‘3d modeling artist’ I am still a patreon of because he is quick and creates relatively quality morphs. Plus he makes all of his morphs free after 1 month after release and always takes the time to answer any questions you have.
Correct if I’m wrong about the collaboration, though.