Also, walking away from ~ $850 mil and investing time and money into Signal speaks a lot about Brian's commitment to privacy. He admits he was a sellout. He didn't mince words but David's last paragraph, Facebook being all about people but not about selling-things/entertaining/helping-find-information is disingenuous. Facebook is all about sucking in people's attention, so they can sell ads. They want to suck as much information about people as possible; entertain you as much as possible with mindless video and photo sharing. There is nothing wrong with a business making money. David shouldn't delude himself and others into believing Facebook is holier than almost any other business. I guess, he has to keep up the pretenses as an exec. sigh!