There does seem to be a lot more activity on the social media these days. As @BobAndersson I inhabit Twitter-space (or should that be twit-space
) where Gordon (@Cameralabs) regularly flags review updates and shares photos and thoughts about food (often burgers) and coffee. I don't inhabit either Facebook or Google+ but my understanding is that there is similar activity there, maybe even more as they don't have the 140 character constraint.
It's not so long ago that BBS's were the bee's knees and I wonder if, with very few exceptions, specialist forums are going the same way. In the time I've been active here the digital camera market has matured and the smartphone has largely superseded the compact camera. As a result some of the excitement of wave after wave of new tech has diminished and, for all of us, there are only so many occasions in a lifetime that one wants to explain the basics of shutter speed, aperture, DoF etc., especially as the answers to those questions can be found either by a forum search here or much more widely by a search of the web.
With less to talk about on the tech front as the pace of innovation subsides that leaves photo sharing as a major activity and it's my opinion that social media and specialist photo-sharing sites have a huge advantage over forums, both in ease of use and the size of the potential audience. But that's just my take on it, not an official CameraLabs position.
So far as new registrations are concerned yes, the spammers are a pain although I more often than not see zero content posts from such accounts which, no doubt, will either be edited later or have signatures added by the owning bot. We had a quiet time for a while last year but that was because Gordon deleted all accounts with zero posts and also temporarily closed the forum to new registrations completely!