US lawmakers ask 8 digital-ad auctioneers, including Google and AT&T, to name foreign clients who had access to user data through auctions over the past 3 years (Patience Haggin/Wall Street Journal)

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Patience Haggin / Wall Street Journal:
US lawmakers ask 8 digital-ad auctioneers, including Google and AT&T, to name foreign clients who had access to user data through auctions over the past 3 years  —  In letter to companies including Google and AT&T, lawmakers request information about how user data is shared in auctions

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