“I think it’s the largest piece of evidence I’ve ever seen that provides information about what I call today’s “distributed surveillance economy,” said Wolfie Christl, a privacy researcher at Cracked Labs, who discovered the file and shared it with The Markup.

From “Heavy Purchasers” of Pregnancy Tests to the Depression-Prone: We Found 650,000 Ways Advertisers Label You – The Markup
A spreadsheet on ad platform Xandr’s website revealed a massive collection of “audience segments” used to target consumers based on highly specific, sometimes intimate information and inferences
