These stock photographs are free for you to use in whatever way you choose. You may publish the artwork you make from them anywhere you desire and sell your artwork for whatever price you cn get. I ask for nothing in return except the following two thing:
(1) Credit me as the stock photographer
(2) provide a link either to this Deviant Art page or to my personal website
If you want to, you can also tell me (email, comment, private message) if you've used one of my pictures so that I can check it out and see what you've done.