Yes, LiveJournal has had cliques of users splitting off. But part of the reason you notice them is that LiveJournal is very well suited for people writing long

Yes, LiveJournal has had cliques of users splitting off. But part of the reason you notice them is that LiveJournal is very well suited for people writing long posts where they bitch and moan about how they're going to leave, and having other people comment on them, in a way that lots of other sites aren't. Basically, LJ is a hybrid blog/social networking site (although I don't think the word "social networking" even existed back in 1999). (Of course, I should note that I've been an LJ user for seven and a half years and have met lots of people who have been important to me through it, so I'm not exactly an unbiased observer.)