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Google and Mastercard cut a secret data deal

By Bloomberg   |   01 September 2018   |   6:18 am  
For the past year, select Google advertisers have had access to a potent new tool to track whether the ads they ran online led to a sale at a physical store in the U.S. That insight came thanks in part to a stockpile of Mastercard transactions that Google paid for. But most of the two billion Mastercard holders aren’t aware of this behind-the-scenes tracking.
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