I've literally been writing about these scenarios for years. Was dismissed as alarmist, anti-data, etc. http://firstmonday.org/article/view/4901/4097 …https://twitter.com/whataboutzana/status/826068269224177664 …
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Ads in general are hidden data for so many people. You and I can visit the same website with different ads and influences.
isn't it frightening we will never have the full picture about the 300,000 pieces of content that the Trump campaign promoted on FB?
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