Publishers can limit which vendors collect data from their users through their site. Quantcast Choice enables setting up a "whitelist" defining a subset of vendors from the IAB Global Vendor List allowed to be displayed in the Choice modal.
Note that in order to use this feature, the level of consent that a publisher chooses must be service-level (site-specific), not global. This will store a user's consent preferences and the signal passed to vendors in a first-party cookie on the publisher's domain.
To set up this feature, publishers can create the vendor list using the Choice Portal’s Vendors Configuration Page.
The Vendors Configuration Page allows the user to select vendors to block or unblock using simple UI interaction. Once the configuration is complete the CMP will retrieve this configuration at runtime and will show the desired list of vendors.