I don't know if I agree with the whole "clique" theory. I think there are some different levels of comraderie, though.
Every single person on this forum started as a nobody with zero posts. Very, very few, if any, people came here with a reputation as a great builder and none of them had some multi-thousand post count. The people that automatically garner pages of responoses, earned it. And not always because they build the most accurate whatever or have the best skills. But mostly because they worked at making themselves useful around the boards; sharing tips, hints and tricks. Honestly, having some building skill doesn't hurt either, but there's more to it than that.
Personally, I don't think I'm in any particular clique. If I am, I don't know about it. But a decent amount of my threads get multi-page responses. Is it because I'm a master builder? Hardly - at best I'm slightly above average. And that's taken years of practice and trial and error building. There's nothing I'm not willing to try, even if I have no clue how I'm going to do it. And I'm more than willing to share all those tips and hints and experiences as to what works and what definitely doesn't. But what I have done is built up friendships and trust by helping others. That garners respect and that leads to more people willing to comment on my builds.
Another way to build up the comraderie is to join, or even start up, a group build. At least in a group build, you know everyone in there is interested in the same subject. On a whim, I started an F4U group build. It's over a year old, 86+ pages deep and still active. I made a lot of friends just from that build. And I also learned a lot from people who have way more skill than I.
Just posting isn't enough to get, or expect, responses. Unless your first build is especially extraordinary, it's going to take peole a while to feel comfortable enough to post comments. Start slow, and work on building your skills. With time and practice, you'll get a reputation as someone who does good work and people will post.
Honestly though, in a build thread, I'd rather no one posts than get a bunch of phony "attaboy"s from people just looking to boost their post count. If I post on someone's thread to tell them I like their project, I'm going to tell them exactly what it is I like. And I have no problem telling someone what could be fixed or done differently, either. People won't get better without honest, constructive criticism.
-Fred