For those looking for how to request your information:
This is what I've found so far on the privacy policy page.
It sounds like it may be available only for california residents.
> In addition to the information, controls and rights detailed in this privacy policy, California law provides for specific rights for California residents. California residents may request access to Personal Information, request a copy of their Personal Information, or request that their Personal Information be deleted. You may submit a verifiable request through Quantcast’s Data Subject Rights page, which can be found here. California residents may also submit verifiable requests by contacting Quantcast via email
This is what I've found so far on the privacy policy page.
It sounds like it may be available only for california residents.
> In addition to the information, controls and rights detailed in this privacy policy, California law provides for specific rights for California residents. California residents may request access to Personal Information, request a copy of their Personal Information, or request that their Personal Information be deleted. You may submit a verifiable request through Quantcast’s Data Subject Rights page, which can be found here. California residents may also submit verifiable requests by contacting Quantcast via email
https://www.quantcast.com/privacy/