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A comment on “Ultrasonic cross-device tracking” embeds inaudible tones in advertisements. Parent comment

Re:“Ultrasonic cross-device tracking” embeds inaudible tones... by mzw_mzw on Friday November 04, 2016 @05:47PM (#12876438)
How do you define an "advertisement" and how do you keep the Advertising Definition Agency from getting stacked with people who define opinions they disagree with as advertisements?
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