Ya most people on this site trickle in because they are unsatisfied with sites like Reddit. The big migrations are weird though, I wish I had the link for one thread following one because it was just...not hubski.
I remember when Voat took off after the banning of /r/fatpeoplehate and the like. I checked it out then myself,* although I never found it to be a particularly interesting community even then. Someone listed hubski in a post setting out a bunch of alternatives, and this was the only one that looked like it was worth being a part of. *Disclaimer: I didn't care that they banned that sub in particular, I just disliked how arbitrary they were about it. Plus I was sick of the admins' attempts at taking curtain calls when it was obvious they were just bowing to outside pressure (see also: the /r/jailbait incident and surrounding craziness).