One big reason for blurtit's problem is that the owner could care less about the site. I found that out first hand and got booted for getting on him about the spam and trash there. I looked at the "Discover" page a while back and it was nothing but spam.
I have also noticed that the old users only talk amongst themselves and answer no one else's questions.
They don't update the site for weeks at a time and just leave the spam. It used to take me two hours every morning to update it and clean out the spam. Totally burned me out.
Most have went to a silly little Disney type site where they can all gab with each other and I looked at it and didn't see one intelligent question.