I never go for those types of offers. Don't know of any professional artist who does, actually. It's nothing personal, it's just that most games are abandoned before publishing, and of the ones that get made the majority sell very poorly. It's a bad investment, and art is difficult enough to make a living off of without that kind of risk. You may be able to find an inexperienced artist who's willing to do that sort of split. You'll need to make a really great pitch for the game though, something that makes an artist want to claim the project as their own. Since the money offered is the equivalent of a lottery ticket you need to offer something else to get people to spend their time and effort on you.
I understand what you are saying. I'm actually a capable 2D and 3D artist. Plus animation too. Just wanted someone to work with so I could focus on code and the music. I've been around a long time and have completed many projects. Anyways... Maybe I'll just do this myself. Thanks for the response. ;)