[barbariangrunge]

Can anyone comment on how effectively privacy is preserved with this approach?

[throwawa14223]

If I understand it is not privacy preserving with regard to you and the aggregator but it is preserving with regard to you and the ad agency.

[ndriscoll]

Only if you redefine privacy. I don't want any of my information being leaked.

It is plausible for example that you could form a statistical cohort around people that work in an organization and determine that they have become interested in a topic that reveals internal plans.

Even as an individual, I can only see more accurate modeling of my interests as a tool to be used against me. I do not consent to sharing those correlations. They are private.