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BeforeWhistleblower Christopher Wylie details how Cambridge Analytica siphoned Facebook profile data through quiz apps, reigniting debates over consent, psychographic targeting, and the firm's work for the Trump campaign and other right-wing causes worldwide. The scandal triggers congressional hearings, FTC fines, and platform policy changes, galvanizing cross-partisan calls for privacy regulation and forcing campaigns to rethink how they acquire voter data in a post-2016 environment.

AfterWhistleblower Christopher Wylie describes how Cambridge Analytica obtained Facebook profile data through a personality-quiz app, and how the firm marketed psychographic targeting to clients including the 2016 Trump campaign. Congressional hearings, a UK Information Commissioner's Office report to Parliament, a Commons select committee inquiry, and FTC actions against both Facebook and Cambridge Analytica followed over the next eighteen months. Facebook also restricted third-party app access to friend data. How much the firm's targeting actually moved votes remains contested and is not …