Joseph Cox’s reporting on the geolocation/tracking shit the US Gov buys up really highlights the direct link between consumer tracking (to sell them shit) and government intrusion into privacy.
"With thousands of attributes on more than 300 million consumers and 126 million households, ConsumerView data provides a deeper understanding of your customers, resulting in more actionable insights across channels."
https://www.experian.com/assets/dataselect/brochures/consume...
"When a user enters a venue and dwells for at least two minutes, our Pilgrim technology records all of the signals available on the phone. It then matches that person to confirmed signals from our panel of 13 billion in order to register a visit. Utilizing stop detection technology and dwell time is crucial for reporting visits because we are capturing true visits as opposed to someone driving by or sitting in traffic nearby."
https://location.foursquare.com/visits/docs/how-does-visits-...
"Cross-device targeting is a method of advertising where you display ads on various devices belonging to one user from the target audience.
An average user uses the internet on three different devices. They look at their smartphone first thing in the morning, work on their PC, surf the internet on their tablet on their way home, and drift off to sleep with their TV streaming turned on. Imagine that you can display your relevant ad on each of their devices, with your message following the user throughout their day."
https://www.onaudience.com/resources/what-is-cross-device-ta...
... and many many many many many many others.