To directly answer your question about where people are getting exposure and selling, I think social media is playing a big role at the moment. I'm personally on Instagram a bunch and have a lot of people following me (as well as following other makers myself, always wanting to learn from and be exposed to everybody). Although I have an Etsy store, I get random inquiries all the time and haven't had anything in the store for a year, half because I'm a hobbyist that never has inventory and half because people ask for dibs on anything I post on my social media so everything basically is presold. If I was making 10 knives a month instead of a year, then maybe that wouldn't be the case (although this year is even less knives completed by far unfortunately
).
In person, you might do okay at arts and crafts fairs/shows depending on the clientele; tire kicking shows not so much, shows where people with disposable income are magpies would be better especially since you'll probably have less competition. Somebody who sees a cool knife you have at your table have few other choices in knifemakers to distract them versus pottery and wood workers who would be a dime a dozen in comparison.
I wouldn't necessarily poopoo the enthusiast kitchen knife forums. You can gain some traction there if you catch some interest. KKF has pumped up Joe/Halcyon Forge within the last year as well as others but it's a bit of luck depending and the members tend to be biased towards Japanese styles. However, other kitchen knifemakers like Don Nyugen, Ian Rogers/Haburn Knives, Mareko Maumasi, Bryan Raquin, the Bloodroot knives boys, and more are never having problems selling $500 to $2000+ knives, only problems keeping up with demand. However, the vendor subscription cost at KKF is way too expensive IMHO (think it's $750/year). On the other hand, you can get a free subforum at the Chef Knives to Go forum and could send out a passaround knife to promote yourself. At least it's free, and if you post attractive knives, people will see them...
One thing about the kitchen knife enthusiast forums: if you would make custom Japanese styles wa handles and possibly custom sayas, you could potentially rake in some nice cash. The same people who won't take a chance on a custom kitchen knife by a western maker will still happily drop $100 to $200 or even more for a new handle on their Japanese kitchen knife.
Personally, I'm only interested in making my own knives, not rehandling other makers' knives, but if I was in business full time, it's definitely a revenue stream I'd consider pursuing.