Yeah, and that's the point.
You've randomly found us, which means that you hardly know anyone in this clan nor do you know what kind of clan we are etc.

Just joining a clan in order to be part of a clan is kinda meh. It's more about either joining a clan where you actually know some people (or where the members seem to be quite nice to hang out with, etc), joining a clan that's focused on your favorite mod, or about joining a clan that wants to be somewhat competitive. At least in my opinion.