Facebook is inherently conflicted. It promises advertisers it will deliver interested and engaged users—and often what is interesting and engaging is salacious, aggressive, or simply false.
Rodrigo Duterte Turned Facebook Into a Weapon, With a Little Help From Facebook, December 10, 2017 at 05:32PM
Foursquare had people’s trust. It was a fun app that, perhaps thanks to the fact it never built a real advertising business, never gave its users a reason not to share their location.
On Agency Commissions and Fees, Google’s Advertising Changes, Foursquare Analytics, April 27, 2017, at 09:59 AM