What do you mean by "net book"?
"Do the owners retain all bits of ownership of the material in a sense of the copyright so that no one can earn a monetary value from them and the works would be used for personal, non comercial use?"
Uh, well, we may borrow off of each other. As far as I know, Strolen isn't going to publish anything on the site. If you have a problem with people borrowing (i.e., using in games of their own) stuff which you came up with, you could just tell us so, and we won't use it.
Does that answer your question?