One mod can't purge a subreddit, reddit takes action against topmods that purge existing teams because in the grand scheme of reddit most top mods do almost nothing anymore, they're people that started a place and then abandoned it leaving the place to whoever the latest person with motivation near the bottom of the hierarchy is.

A top mod can't just come out of inactivity and purge a team that created an existing community. Understanding admin logic is important here in this scenario, they wouldn't be doing that to animemes because the team is actually all behind this decision.

As for their splinter subreddit -- Yeah it'll definitely be quarantined. These people are obsessed with enjoying the worst elements of anime. It'll be filled with racism, bigotry and underage sketchy loli content in no time at all. When admins come in to try and tell them to clean up their act their reaction will be EXACTLY the same as their reaction to the animemes mod team trying to clean up their act, except that kind of combativeness with the admins is a fast-track to ban town for these communities.