Privacy International reports:
For each and every single one of these links, Quantcast claims that it has obtained my consent to be tracked – but that is only part of the story. Quantcast has no direct relationship with the people whose data they collect. Therefore, most people have never heard of the company’s name, do not know that they process their data and profile them, whether this data is accurate, for what purposes they are using it, or with whom it is being shared and the consequences of this processing.
(click here to continue reading I asked an online tracking company for all of my data and here's what I found | Privacy International.)