I have over 10 accounts, my mate has 20 something but we only ever really give invites to friends or use them to make even more accounts.
So in short, unless you ask nicely with half decent spelling and provide an entertaining story as to why you should get an invite, you are shit out of luck.
Didnt BA close down last year? And it came back. During the "down" time everyone just moved to another Battle.net server, Aus1. Its mainly a starcraft based Aussie Battle.net server though.