I have the same problem, too. Once in a while, I have to be on my phone, and other times it just doesn't happen.
I may be semi-literate, but depending on the day and my mood, I just can't. Especially since there's times where I'm so pissed off or exhausted that I can hardly write five lines... and that seems to happen a lot. I think you should lower it, to be honest.
I can TRY to invite people, but I don't know if I know semi-literate people who are fans of Divergent.
Sorry for not posting last night to tell you my input, but I was so damn tired I fell asleep at 9:30.