Cambridge University psychologist Aleksandr Kogan sold Facebook data to Cambridge Analytica via his company, Global Science Research. Kogan also bought public data from Twitter, The Telegraph reports. Twitter says Kogan obtained no private data about its users. Facebook has said that as many as 87 million people could have had their data transferred to Cambridge. Facebook: Day of Reckoning, or Back to Business as Usual, has prompted regulatory investigations in several countries and an appearance by Mark Zuckerberg before the U.S. Congress.”]
Source: https://www.cuinfosecurity.com/twitter-sold-data-to-cambridge-university-psychologist-a-10926