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...
I think it won't be overnight, but there's probably a sea change coming where more and more people are getting fed up with gigantic centralized platforms and all the manipulation and trolling that the companies operating them are all too happy to let go on. I seriously doubt the mods are going to get their way on Reddit, but I suspect it's going to get even less worth visiting from here on out.