As far as I can tell this is out of OCRemix's hands. This phenomenon is not exclusive to this community, and it's a sad thing really.
Ever took the time to look through the communites, forums and blogs you used to visit when you were younger? Chances are they are all dead.
I was active in a lot of different communities and now they seem like ghost towns. A single post every few days (or hours if you're lucky) is keeping most of them barely alive. You can't even have a nice conversation anymore because people just left.
So where did they go to?
Well, there are exactly two answers here: Social Networks and Semi-Anonymous communties like YouTube and Reddit.
The thing is - people just don't seem to want to start meaningful conversations with strangers anymore. Ever seen the comments section of Facebook or YouTube? They are full of people talking past each other. Nobody cares what other people have to say - they just want to get their own stuff out there.
Reddit is the only place that's reminiscent of 'forums' from the past. But even here you should be able to see the difference: ever met someone nice through reddit? No? Neither have I. Reddit is a step up from Facebook and YouTube, but people still don't feel like people. They are just defined through their comments. I don't think anyone could meet anyone new here. I can't even remember anyone's name on Reddit and I've been browsing there for years now.
So, I think this whole trend is due to the fact that people just left forums to spend their time with social media instead. They don't care that much about making new contacts through the Internet anymore. Sure, some do, and there are some exceptions (like the Boardgamegeek community for example), but times have changed. It's really, really sad, but I just don't think there's any end to this.
Let's face it - forums are a thing from the past. Just like N64 and Super Nintendo they will never fade from our minds but just aren't relevant anymore in the grand scheme of things.