Govteen is a super site! They have 28,000+ members in total, and their material is great. Like Ant said, it's been around since 1998 (actually, VirtualKid was and then Admins joined Govteen in 2002). It's very popular, and probably the reason why it's so big is because it's a primarily teen website with lots of material that people can search for.
Such as...'teen religion' or 'teen forums', or lots of other tags. In fact, VT was created by Josh (TheWizard), who is a non-active member of Govteen.
I think we could be a 'more popular' site if we could just upgrade some things a little bit. But I don't know what to do and I don't think anyone has liked my ideas so far so meh.