512 is fine imo, FC's should not get bigger than that, I'd consider it a monopoly on players if it did. And you can bet that when people hit 50 there not going to stick around very long if they get skipped over for Titan HM, and BCB/crystal tower etc.

Your FC is bound to devide eventually, it's inevitable.

How can you even manage 512+ people... Large FC's are the worst, I like FC's that are nice and small.

Problem is most players don't realize you can be in 10 linkshells. So I join a small FC that get's crap done, then I formed my own linkshell with 50 plus people in it I use for farming CM/AK etc etc