Agree on communities over here getting created during the exodis, seeing a small surge, and then kind of withering. I'm subbed to 15ish communities that aren't even all that niche (3D printing, photography, woodworking) and it's rare that they all get one post per day. There are obviously people lurking because posts will get comments, but I think we're all a little wary of being the person to post a bunch of content for fear of no one else doing so.