You assume that if the movie was in 700 screens, it would make 10 times the money. I doubt it. The 70 screens were carefully picked-in areas where democgraphics support this type of movie. If the Hollywood crowd thought this movie had universal appeal, it would be everywhere. The movie doesn't; it would fail miserably in most venues.
I said just that. Here's what I said:
That being said, those theatres are in mostly urban areas and gay friendly places like NYC, LA, and San Francisco. I don't know how well it will do in wider release.
I agree, it is a niche movie and has a rather limited demographic. That said, it had like a 14M budget and I think it will easily make that back. We'll have to see how it ends ups doing but I think once it gets wider release it'll end up with at least making back its budget and probably more than that.