Interestingly, it's not quite that simple. Instructor type painters are a pretty specialized arm of a fairly small hobby, and one that is associated more with toys than art in many people's minds. I literally cannot give away my knowledge in my local small city. I once successfully charged $5 a head for a few classes with proceeds going to charity as part of a fund raiser convention. (And that included me giving away the figures.) I've started a local paint club here, and while it definitely gets interest, that interest is primarily from role-players who want to get a character or two painted using the club supplies so they don't have to buy a bunch of stuff. It's just teaching drybrushing and washing over and over and only a couple of people remotely interested in talking about anything beyond that level. I'm pretty sure we have some other local painters who paint a bit more in depth than that, but they seem content to stay home and do it on their own. (And yet at the same time, I have had painters that I know from ReaperCon in surrounding areas who will drive several hours for the occasional opportunity to paint together and seriously talk painting, but likely not enough that I could try to do a weekend workshop without traveling to a larger population center.)
Even CMON Expo is only slightly better. It's in Atlanta, so a bigger city, and run by Cool Mini or Not, which you would imagine would be reaching an audience that's pretty interested in miniatures. ;-> Expo gets far more attendees interested in gaming than painting. Even after several years of trying, and having Jen Haley on staff and a few other of the instructors who were at ReaperCon (or are of that caliber) as guests, it's not something many painters seem to want to travel to. In 2015 we did ReaperCon style classes that were made available to attendees for free. I had one class literally no one showed up for, and most of us had open seats in other classes. (Some very enthusiastic painters did come out, it's just it was a small number of them.)
So you sort of need a critical mass of artists/events to attract an audience, and a critical mass of audience to support bringing those people in. Which is an overly lengthy way of saying that ReaperCon is pretty cool for us, too!
CMON, though still big on gaming, actually had a massive show out this year for painting. Not necessarily the contest, but to paint. There were several painter classes that were beyond full and the paint and take tables were loaded this year. It was the sort of thing that started up late with the rush and died out early but I think the turn out was better than the first time I went two year ago.
Apprently there's a second miniature painters convention the Mr and I are going to try in February. This is their first time, I think, offering painting classes but its just for painting. Its typically for the military painters but the following seems to be dwindling so they are pushing for more fantasy painters and other styles.
I do think Miniature painting is still a thing, its just people do not know where to go sometimes. We are that small knit group that will have paint and takes at our local shops or drive several hours just to paint with friends and talk about painting.
At Dragon Con many new painters or Returning painters were asking about the Reaper Paints on the table and who they were, do they have minis and etc. If I didn't use my own bones models for paint and takes or sharing and practice, I would spread the love more but I'm only one person.
Better believe I'll be blowing the Reaper Con horn at the painting con here in February. If it doesn't bring Reaper to Georgia Cons then I'll bring the people to Reaper.