Since September, ProPublica has been encouraging Facebook users to …
Since September, ProPublica has been encouraging Facebook users to share the categories of interest that the site has assigned to them. Users showed us everything from “Pretending to Text in Awkward Situations” to “Breastfeeding in Public.” In total, we collected more than 52,000 unique attributes that Facebook has used to classify users. […] To find out exactly what type of data Facebook buys from brokers, we downloaded a list of 29,000 categories that the site provides to ad buyers. Nearly 600 of the categories were described as being provided by third-party data brokers. (Most categories were described as being generated by...
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