Hee! Well, the lack of those things in canon is what needed fixing! And, boy, does fanon ever fix it. ;D
so even if some of the fans are still there, there's no one to write the stories.
Oh, idk. People come and go. It's the nature of things. But new people join the fandom all the time and bring in new interpretations and re-interpretations. There is both good and not-so-good new fic being written every day in every fandom whether that fandom is brand new or 45 years old (or more).
Heh. Well, I already mod a Snarry-only fest in January (Snarry Swap), Aprilish (Snarry-a-Thon), and Sept/Octoberish (theme Snarry). I'm not sure when else I could host something, really. Though others are certainly welcome to do so. I was actually thinking about doing a modified Big/Little Bang as the theme fest for next year. Though if someone else jumps on it first, I'm always happy to see more Snarry.