[rminusq]

Well, I don't play much NL, but as a rough guess. In 100 hands, assuming maybe 70 get the drop (it's only if it sees a flop, right?). Then there's $35 dropped per 100 hands. That's ~9 PTBB/100. So if you win 1 out of 9 hands, the BBJ costs you 1 PTBB/100.