It might sound cynical, but I think many Facebook/Google employees use ad blockers for the purpose of finding flaw in the blocker / circumvent the blocker so th

It might sound cynical, but I think many Facebook/Google employees use ad blockers for the purpose of finding flaw in the blocker / circumvent the blocker so that ads can show to user who use adblock. And then Adblock staff would find out about this and proceed to improvise their Ad blocking formula. It's like a cat-mouse chase game cycle.