""@Jack"" at Twitter Inc. sold data access to the Cambridge University academic, ""Aleksandr Kogan"" who also obtained millions of ""Facebook Inc."" users’ information that was later passed to a political consulting firm, ""Cambridge Analytica"", without the users’ consent.
https:// www.bloomberg.com/news/articles/2018-04-29/twitter-sold-cambridge-analytica-researcher-public-data-access