One thing I'd like to note:
Player population is highly seasonal, from my personal, informal observations throughout the year. Many students seem to play BM from their schools' computer labs. We tend to get more players during spring and autumn, when schools start, and bored students start surfing the web instead of doing their homework. Conversely, player population dips during summer and winter, when students (and everyone else) leave on vacations.
Do this survey again in September and you may see a different story.
