I see Ellora's Cave is "now accepting new genres!" Specifically: comedy, new adult, nonfiction, thriller/horror (this is the same thing now?) and sci fi/ alternate reality.
Why are they suddenly an all genre publisher now? Maybe because the number and quality of romance and erotica authors willing to submit work to them has finally dropped too low to maintain a profitable output in their "trademark" genre?
I get the feeling I could probably post a new erotic romance market every day, or at least every second day. As of yesterday you can add a new imprint from Tule Publishing to the list.
Their marketing and semantic so far look very same-y (a.k.a. "I want to make money from chick porn"). But seeking to start with a stable of just five authors is a break from the usual high volume model.