Data flows from and in and out of data warehouses is very commonly known now [1]. It would be very surprising to me that FB, Google and Amazon aren't participat

Data flows from and in and out of data warehouses is very commonly known now [1]. It would be very surprising to me that FB, Google and Amazon aren't participating in that marketplace. [0] https://themarkup.org/privacy/2021/12/06/the-popular-family-safety-app-life360-is-selling-precise-location-data-on-its-tens-of-millions-of-user https://themarkup.org/privacy/2021/12/06/the-popular-family-..., https://themarkup.org/privacy/2021/09/30/theres-a-multibillion-dollar-market-for-your-phones-location-data https://themarkup.org/privacy/2021/09/30/theres-a-multibilli..., https://themarkup.org/privacy/2021/03/25/i-tried-to-use-the-ad-tech-industrys-tool-to-opt-out-of-personalized-ads-did-it-work https://themarkup.org/privacy/2021/03/25/i-tried-to-use-the-... (more investigations have been done by WIRED as well).