Document reveals Facebook was informed in 2014 that Aleksandr Kogan's company's survey app could sell user data, which broke with Facebook's policy at the time (Financial Times)

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Financial Times:
Document reveals Facebook was informed in 2014 that Aleksandr Kogan's company's survey app could sell user data, which broke with Facebook's policy at the time  —  Facebook was informed that the app at the centre of a massive data leak could sell user data to third parties …