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A comment on Chase had ads on 400k sites, then on just 5k, with same results. Parent comment

Re:Chase had ads on 400k sites, then on just 5k, with same r... by njharman on Thursday March 30, 2017 @01:23PM (#13997206)
Cause you visited sites that those people also visit.

Also cause a lot of adtech is not sophisticated.

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