All of our sites have models who are mostly exclusive to us. There's a small handful that have appeared on other sites, but in general, it seems that the guys that work with us generally don't want to work anywhere else.

I echo the thoughts of others. Some models are on every site on the planet it seems like, and we hear from our members that it gets really tiresome seeing the same guys on all these different sites (even in different scenes...) unless that model is one that people can't seem to get enough of, like Sammy Case a couple years ago. But in my experience, he's really the exception, and even he got overexposed.

The other thing is that I don't think it serves the model's best interest to work for a bazillion studios. Carefully choosing a few that will meter the content out slowly over time is the best choice both for the model and for the site, in my book.