Sure. But in the end the limiting factor isn’t the audiance, but the organisers who have to put in the time and effort to make things happen, and so it ultimately comes down to what the latter are interested in doing, simply because no-one is going to expend any great effort on an idea they think sucks.
This is the case even with the annual KapCon LARP. While we specifically seek public input on the theme (this year’s threads are here, in the end we rely on having writers sufficiently inspired by the discussion to step up. If no-one does, we don’t get a LARP.
It’s volunteerist. It’s anarchic. And it works for us. Wellington now has two more annual tabletop cons because people went “I want to do X” and ran with it. On the LARP front, we have a shortage of LARP organisers, and so fewer get run.