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The sites mentioned "ESPN, Google, MTV, Hulu, ABC,MySpace, NBC, YouTube, Yahoo, and Scribd" are co-defendants in a now-dismissed lawsuit against Quantcast. None of the sites were even accused of using zombie cookies directly - they merely integrated with Quantcast, which was at one point using zombie cookies. Quantcast has long since stopped using Zombie cookies so the sentence as stated is entirely inaccurate.