I'm a little late here, but I wanted to jump in with a clarification on the offense taken by the "why would anyone buy something they couldn't use in commericial work" stuff. The difference here is that if you buy Poser, Mike, Vic, etc. just to play with (and I don't want to think how much I've spent doing just that) and then somehow get a chance to sell one of your pieces that uses them, you can do that. You have the right to use them commericially, whether you do so or not. In this case, you wouldn't have that right. I sincerely doubt I'll ever be able to sell anything I make, but I also won't buy something that has a personal use only clause in the license because, frankly, it's just selfish. Freebies are all right (I have that clause in my freebies as well, though I need to rewrite and clarify that I mean work intended specifically for profit) because the provider is doing a favor and getting nothing in return. A vendor is not doing a favor, they're doing a job, and one of my job requirements is freedom to do whatever I want with the images I make with the model. On the other hand, if that's not one of your job requirements, that's cool too.