I think part of it is that SA's current culture really doesn't care about bringing new people in. The people there are quite happy talking to themselves on what

I think part of it is that SA's current culture really doesn't care about bringing new people in. The people there are quite happy talking to themselves on what they will happily call a dead forum. People leaving over time is the natural state of any platform; they're just below replacement rate and not too fussed over it.