Niall Carson/PA Wire Facebook has long let users see all sorts of things the site knows about them, like whether they enjoy soccer, have recently moved, or like Melania Trump. But the tech giant gives users little indication that it buys far more sensitive data about them, including their income, the types of restaurants they frequent and even how many credit cards are in their wallets. 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. Download the Facebook interest category and ad group data ProPublica collected to report this story, available now via the ProPublica Data Store. Facebook’s site says it gets information about its users “from a few different sources.” What the page doesn’t say is that those sources include detailed dossiers obtained from commercial data brokers about users’ offline lives. Nor does Facebook show users any of the often remarkably detailed information it gets from those brokers. “They are not being honest,” said Jeffrey […]

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