Will it though? Twitter's moderation policies have all but collapsed and the net result is a near-total flight of high-profile high-dollar advertisers.
Like others have mentioned in the thread, the people who will most likely want to take over these subs are going to be some combination of bigots, cranks, and the severely deranged. That doesn't seem like it will do good things for user participation or advertiser attractiveness.
Who wants to advertise on /r/movies if the mod team is exclusively made up of chemtrails connoisseurs and the main topic of discussion is what movies are secret plots by the Jewish cabal?