i think model makers should be able to ask for whatever they like in return for allowing a user to make a render with their model - be it money, credits, or whatever.  i just think people should be able to clearly see the product is not for commercial render very clearly PRIOR to download. ie it shouldn't just say "not for commercial" because some  people take that to mean not selling the mesh but they assume renders are their own.  it should say not for commercial render.  the readme can contain what people can and can't do with the mesh itself as that part will not be relevant to the vast majority of our users as we are not mesh sellers.
love esther

MY ONLINE COMIC IS NOW LIVE

I aim to update it about once a month.  Oh, and it's free!