I'm not sure on a lot of it. If it's free it's free to use as you want. I think if someone uses my stock which is unrestricted except for you know the usual rule as don't just change the color and call it yours type of thing. And as far as Commercial I basically just would like a copy or 2 to show friends or to know where it will be to show for bragging rights. And credit if possible just as out of respect for me the provider of stock. It's all so overwhelming that like *fshi in I can take the picture for my art so I can call it my own great but to poor to be able to pay for models or travel to some of those beautiful places. If I took a picture of a toy should I give credit of the maker of that toy and to each of the parts company that went into making that toy? Like is said it's mind blowing. My heads going to blow there are so many ways to look at it. I just for me in a nutshell if you photo was used in a primary focus of the work of art it would be respectful to give me credit if possible and if commercial a copy of the project or notice where I may be able to see it from my home either on TV or computer! Thank for the topic so near and dear to my heart! Hugs Jewels