That sort of thing is never a *complete* rule, of course, there are always exceptions, but for the most part that's how it goes. It's a crap rate, but it's the best you can get and even with that crap rate most people will make a lot more money selling through BFG than on their own.
That sort of percentage is absolutely not standard in so-called 'hardcore' portals or appstores, although developers often fear that it might become such eventually.
(As for the original question, I have games on BFG and made decent money with them years ago, but I'm not really doing things with them anymore because I've moved in a slightly different direction.)
Edited by hpapillon, 15 August 2012 - 02:50 AM.