What about copyright? I clicked the entry link to see what rights the contest owners are assuming and they're reasonable, essentially the right to publish the work in the book and use it and the author's name with regard to promoting the book. There are a lot of very unreasonable agreements out there using a standard licensing arrangement that irrevocably gives the licensee nonexclusive rights to the content that allows them to go so far as to even sell such content along with the rights to whomever they choose. That license was in a contest that DAZ cosponsered (not typical of their regular license for their wholly sponsored contests and gallery) and the Internet Movie Database, IMDB, uses it, as well as others. Rendo's only asking for rights in association with publishing and promoting the book and that seems appropriate. I'm always surprised how emotional these kinds of conversations get and how quickly people forget that Renderosity is providing a free gallery and free forums. It's not nice to bite the hand that's helping us. This isn't a scam or anything being put out by a fly-by-night outfit. If there were a high probability that I could get into the book, I'd consider entering a piece, particularly since I'd get a copy of the book in return. Without much expectation of winning, it's not worth throwing away the money.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon