A few months ago Steamtunnel at the Hydra's Grotto proposed the re-release of the 1e books as a census. Trollsmyth guesses there aren't much more than 10,000 in the OSR. A commenter mentions ~58,000 downloads of OSRIC. Meanwhile this one dude I've been watching play minecraft on YouTube has close to 130,000 subscribers.
What the hell. Now hold on, yes it's visual and you can sit there by yourself; no need for a game group or products or anything. And yes, I'm guessing a lot of his viewers might be younger, kids in the 11-14 age group, maybe. But this is not action packed Transformer stuff-- I find my self dozing off sometimes when he gets into the minutiae of moving monsters around with pistons. Here's a slow paced technical video where he tries to figure out a conveyor for two monster spawners in Minecraft's version of Hell.
I think a lot of his appeal is that you can learn how to do something he shows you, then go back and do it yourself in your own game. Heck, if you get stuck, you can even download his save game and look at his design in person. It feels similar to some of the blogging we do about D&D rules, like the recent exchange about fatigue and me discussing with John how disease might play out in a campaign. Surely some of Etho's viewers would be interested in playing some simple, streamlined D&D. Or maybe, more than playing, tinkering with the rules and making them their own. So, where are they?