They started with the Facebook friend network and harvested data using "what kind of biscuit are you" type quizzes.
When his daughter, while on an internship at Palanitir, told a guy at Cambridge Analytica about it, that guy built his own version. This was the data they sold to Trump and it became the manufactured data scandal.
Eric Schmit built a whole data processing department for Obama's 2012 campaign
https://web.archive.org/web/20130914184229/https://www.theguardian.com/world/2012/feb/17/obama-digital-data-machine-facebook-election
They started with the Facebook friend network and harvested data using "what kind of biscuit are you" type quizzes.
When his daughter, while on an internship at Palanitir, told a guy at Cambridge Analytica about it, that guy built his own version. This was the data they sold to Trump and it became the manufactured data scandal.