With regards to Goblin: We're not big. We never have been. That's kind of a good thing because we have that small town community feel. However, many of us have found our social veins within the small community and because they're such a precious commodity, we don't really stray beyond it. The raiders know each other and generally seek each other out for things, gatherers for gatherers, crafters for crafters, even the few who enjoy PvP. This does effectively hit the PF hard, especially given that anyone you may not know may not be as capable as you'd need/expect. That's not an insult to anyone on Goblin, but that serves to say that everyone knows somebody who knows somebody, and when it comes to grouping up for content, we don't much stray outside of established social circles (FCs, linkshells, friends of friends, etc.)
I would like to lay to rest the idea that we're a dying server. We're not. We may not be as big or as busy, but we're far from dying.