Larry Flynt Publications didn't think it was viable to continue the magazine any longer. Sales were too poor. If you looked at the ads, it's pretty safe to assume that the income wasn't too great from advertising either. Most of the leading brands didn't advertise in BB. Not to mention mainstream brands, Nike, Mountain Dew etc. No corporate money at all and that's what floats the boat at the end of the day.
Big Brother was the best skate mag ever, hands down. Even though I buy all the magazines, they are hardly worth reading. The Skateboard Mag is an exception and that's only because of Dave Carnie.