>used qresear.ch to get a rough estimate
CBTS had 308 total breads.
#301 was prolly the one when Q decided he didn't like what he saw.
So, let's just use a round number and say CBTS had 300 active Q breads to add to the grand total.
Before that all the way back to /pol/ is total guess work, but prolly no more than 100 for sure.