I've seen my own content offered as (not very good) clipart. So I of course went and rendered them myself with better lighting, bumpmaps and everything and posted them and put the link in the original posters comment section. So there. *lol* Petty I know, but satisfying. So they of course removed theirs, and I removed mine and all is at peace.
(The set in question was one that I sold to DAZ as a freebie years ago. I made my money off it already, so sales now mean nothing. Magic Containers, you probably have it ( Magic Containers | 3D Models and 3D Software by Daz 3D ). They look 100% better in Poser where they were made. The DS versions that DAZ made have terrible surfacing.)
Creators could probably make an end run around this sort of product by making their own similar clipart package and selling it themselves.
LM
I don't see it as petty at all I think it's a very polite way of dealing with the problem.