It's kinda recent. I don't know what motivated him to go there

He spends a lot of time in MGTOW, as do some other accounts that could easily be his alts because they orbit him a bit too much. My guess why he's branching out is that he knows he gets no traffic in his containment boards/blogs, of which I found out he has another in the form of "theculturewar" thanks to the comment about u/ArchRespawnsAgain/, so makes doomed attempts to post elsewhere in the attempt to rally more to his cause. MGTOW looks to be the only board that's taken to him but for different reasons. Imp hates women for his own reasons, MGTOW hate women for their own reasons, however those reasons may not be the same, Imp is just playing them like any snake oil peddler does with the right message. Basically in the same way Literally Who did with Wizardchan board.