> show ads based on preferences and never reveal or sell those preferences to a third party
That's not how modern ad markets work. Those preferences are indeed revealed to third parties, specifically ad exchanges and DSPs, as part of the bidstream data.
Now, you say, those bidstream data contain no PII! Except that de-anonymizing those data is absolutely key to targeting, and is widely practiced.
Recently in the news: "Patternz", an Israeli spy-tech company, for years hoovered up and stored all the bidstream data across 87 ad exchanges and SSPs including Google, Yahoo, MoPub, AdColony, and OpenX, de-anonymized them, and claims to have profiles on billions of users including their location history, home address, interests, information about 'people nearby', 'co-workers' and 'family members'. (See also: https://pbs.twimg.com/media/F-5bA6QW8AAyfSK.jpg )
Please stop spreading dangerous misinformation about the threat programmatic advertising poses to our privacy and national security. Your extremely sensitive data are being passed around willy-nilly and this will not change until RTB is outlawed.
That's not how modern ad markets work. Those preferences are indeed revealed to third parties, specifically ad exchanges and DSPs, as part of the bidstream data.
Now, you say, those bidstream data contain no PII! Except that de-anonymizing those data is absolutely key to targeting, and is widely practiced.
Recently in the news: "Patternz", an Israeli spy-tech company, for years hoovered up and stored all the bidstream data across 87 ad exchanges and SSPs including Google, Yahoo, MoPub, AdColony, and OpenX, de-anonymized them, and claims to have profiles on billions of users including their location history, home address, interests, information about 'people nearby', 'co-workers' and 'family members'. (See also: https://pbs.twimg.com/media/F-5bA6QW8AAyfSK.jpg )
Please stop spreading dangerous misinformation about the threat programmatic advertising poses to our privacy and national security. Your extremely sensitive data are being passed around willy-nilly and this will not change until RTB is outlawed.