By Sneaking Into Ads.txt Files, The 404bot Cost Advertisers $15 Million

For two years, the 404bot worked unchecked, exploiting a flaw in the ads.txt spec that cost advertisers $15 million in wasted video ads. The 404bot served 1.5 billion video ads, according to Integral Ad Science, which revealed the scheme Tuesday with a warning for the industry, including for publishers to audit their ads.txt files. Ads.txt... Continue reading »

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