Brands assumed feeding more data to their AI and CDP vendors was pure upside, without asking what the vendor does with that data once it has it, sitting alongside every other brand’s data in the same system. What “owning” the data doesn’t actually buy youThat distinction matters more once AI enters the picture, because AI personalization doesn’t run on raw records. They’re built, trained, and continuously refined by the vendor, using aggregate signal across every brand’s data flowing through that vendor’s platform. The pattern recognition built from thousands of brands’ records combined is the vendor’s. None of this means brands should stop feeding data into AI personalization systems, that ship has sailed and the upside is real.