The Markup has analyzed the full file, and found for example many super-sensitive health segments.
Several data brokers sort people into categories like 'stroke', 'heart disease', 'leukemia', 'insomnia', 'ADHD', ovulation app users or 'pregnancy test' buyers.
And there's much more in the file.
Based on location data secretly harvested from smartphone apps and other sources, data brokers sold lists of people who visited churches, mosques or the buildings of US federal agencies or defense contractors via the Xandr data marketplace.
…or on people who visited doctors, casinos, a Western Union branch, Columbia University…