I interviewed at FB recently (didn't pass the in-person) and the one question I asked each interviewer was "tell me about the parts of FB I don't see" - because they have an odd hiring process where you don't figure out what team you'd be working with until after you are hired...and I had no interest in pushing Ads, but understood that wouldn't be a great pitch from my side. Turns out there is a LOT about ads at FB.…
Every time I want to contribute to them, I feel guilty because Facebook is behind them. I also have very mixed feelings for the devs working full time on these tools at Facebook, they're smart and doing interesting stuff, but they chose to work for Facebook... Earn big money? Destroy the world? Work on fun stuff with amazing work conditions and ignore what their company is doing? What are their motives?