I know I'm not really active on here anymore since I've not collected for a couple years at this point (went from buying about 5-10 retro games a month to just 4 over the past two years, and only have about half a dozen more left I truly want). I'd guess prices are what's driven a lot of people away from the hobby (and by extension VGS).
It's the same on YouTube too, used to watch at least 50 collecting channels, and of those 50 you'd be lucky to see 2 or 3 still posting, with many of them not even owning collections anymore. I lurk way more than I post, since I don't have much of an insight into current collecting trends anymore (beyond what I hear on Collector's Quest). The community that's on here is great though, love the fact that it's still going - and it fills in the gaps of what's happening in the collecting sphere.
It's a bit sad to think about, but I view it as a hobby that's largely dissolved and those of us left are the ones that enjoy the playing factor just as much as we do/did collecting.