Porn, Piracy, Fraud: What Lurks Inside Google’s Black Box Ad Empire
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ProPublica spent months trying to crack open Google’s black box ad business. We wrote thousands of lines of code to scan >7M website domains looking for Google ad activity, sourced & analyzed data on millions more domains from half a dozen data partners, and spoke to some of the most knowledgeable experts about Google’s display ad business.
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https://www.propublica.org/article/google-display-ads-piracy-porn-fraud