@shauna Facebook. They had an API which let you access information about the logged in user and their friends. This was a good thing, it made Facebook less competitive, made it easier to start new social networks and kickstart from Facebook’s already existing social graph, allowed for third-party, alternative interfaces to Facebook ((such as for accessibility) and overall let users build tools that augmented Facebook in whatever ways they wanted. Then the Cambridge Analytica PR disaster happened, they basically took the data of consenting and non consenting users alike, mostly by having funny quizzes and such which required you to log in with Facebook, and then (falsely) claimed that they could use this data to influence elections. Facebook had to react and closed all the APIs down, which was a win for privacy, but made Facebook into even more of a monopolist than it already was.