I think the big fear is someone creates a model which is the used as the main item in a big ad campaign and the creator gets $100,000 now the model maker would be pretty pissed if he said use in anyway you see fit LOL.......ok a not likely scenario but you see my point. the best option if you intend using an item is to mail the maker and ask them, the few times i've had to do this they have said "sure go ahead" most just want to know what there getting used for rather than a wad of cash, on a personal note my answer is always "yes feel free can i look at the end product" or "yes feel free the fact that you own a PW cd gives you comercial rights to all mine and Rena's items free or for sale (check with any contributed parts though)".....Steve PS forgive the non intentional plug :o)