“A powerful and free new service called DecryptAds scrapes and correlates this adtech data and makes it simple to quickly learn a great deal about the entities that are tracking you.”
ESPN.com runs 143 ad partners and 19 registered data brokers, and nearly half of them grab your location. A Russian ad firm sits inside US military news sites. All of this was published in plain text files the whole time. Nobody looked until three people built a free scraper.