There are people like me who can stay with a game for a long time, but the fact is that many people just aren't interested in a game that starts very slowly and needs time and effort to make you feel like you're actually doing something.
It's not a bad thing of course, there's a market for everything, but don't expect BB to be the most popular game on the internet...
If you make a music analogy, you can state the same for black/trash/etc. metal or some other, less popular music genre. If other chew-and-spit massive mutiplayer manager games are Britney Spears and Christina Aguilera of MOMM, then BB is Pink Floyd or Led Zeppelin; you must really delve into it to appreciate it and you can listen to them for a long, long time. Not so much with Baby hit me one more time or Dirty.
What some people in this thread are proposing is Metallica until Black Album and after, or early U2 works and latest...etc.