The problem with bst ls's is that most bsts have anough bst ls and they are usually on that so the bst ls's that i have had I was lucky to find more then 3 people on it at a time, most of the time i was the only one on it :(
I have actually gotten a few of my bst friends from the bst ls's that i have been in, link pearls to my main ls and now we have 10+ bsts in it, not all on at the same time. But 2/3 if my trio is in it plus 3 lvl 75s plus another 3 or 4 50+ bsts and a few others in the lower lvls.
It is trully just earier to make friends with bsts and put them on your friendlist or get them into your ls or get into theirs, it is too hard to make one on this server, atleast for english bsts that is. I'm sure there are a few jp bst ls's out there.