At the end of the day, the only ones who can choose to make the subreddit private are the mods, and I don't think they've given any public statements on it either way. It may simply be that the mods aren't unified on whether or not to join.
the 1-2 day blackout is a shot across the bow. a lot of subs have committed to going private indefinitely on 6/30, I know there's at least some that are planning on that as well, but haven't gone public about it.