What Cambridge Analytica Actually Had (and Didn't)
Contrary to popular narrative, the UK government's own investigation found Cambridge Analytica's data was a thin, derivative psychographic dataset from a quiz app, its predictive methodology was internally doubted even by Cambridge Analytica staff, and there's little evidence it swung the 2016 election — even though Facebook's platform permissiveness genuinely enabled the underlying data collection.
- Cambridge Analytica had derivative psychographic labels from a quiz app taken by 320,000 people, reaching roughly 87 million profiles through friend data.
- Facebook had already requested Cambridge Analytica delete the data back in 2015, before the 2016 election.
- The UK regulator's report found real-world accuracy of Cambridge Analytica's predictive models was likely much lower than claimed, and its own staff were skeptical.
- The Trump 2016 campaign's much bigger and less controversial advantage was simply using Facebook's standard ad tools more effectively than opponents.
“The Cambridge Analytica thing in particular was kind of a nothing burger.”
“People thought that all this data had been taken and it had been used in this campaign. And it turned out the data wasn't.”