So there are 15,000 subscribers...How many are novelty accounts?

Sometimes it's hard to tell the difference. But, when an account only posts here, it's a little obvious. But that leads to new questions.

Are people afraid of backlash on their main account? Are they looking for an outlet free from other attachments? Are they trolls?

Don't get me wrong: I love the novelty accounts here. I guess my question is, why?