No, I'm saying that they're interested in something that requires less commitment and ongoing interest than Usenet does.
Most web boards work precisely that way.
That's way too simplistic an analysis. You're on the right track, but you've got completely the wrong focus. Web boards are noise. They're the latest flashy hot thing, most of them are pathetically bad, and they'll stick around because they require absolutely zero investment of understanding or long-term interest in order to participate in. This is not the market niche that Usenet should be aiming for.