Some went to https://squabbles.io/s/StarCitizen but really I think this is the most visible. Main problem is that most people from r/starcitizen have other places to go. There are multiple discords and forums plus spectrum. Factor in that there is no real SC news on mondays so most people wont even be checking in until later in the week (when the blackout will be over).
I think it will grow over the next few weeks though. The mobile cutoff is on the 30th. So even after the blackout ends there will be a few weeks before a lot of people even notice something is going on and go looking.
We just need to be proactive with posting stuff here even if it's reposting older content like the ship size comparisons. Anything to get people talking, active and invested.