What it says on the tin, really. I think this is going to be an issue when they get around to the smaller communities... It's going to suck majorly, as most people's default will remain with reddit for community discussion like this...
This is pretty much what I think as well. I migrated to here mostly because I think that the root and core of the Community has done the same, and r/startek was one of the few places where you could still talk Star Trek without unreasonable whining.