They've all been selling data for years and this goes into exchanges for the primary use-case of marketing. The data may not say John Doe, but it's tied to Joh

They've all been selling data for years and this goes into exchanges for the primary use-case of marketing. The data may not say John Doe, but it's tied to John Doe's device. You can already identify that a user saw an ad on their laptop at home and showed up at a physical location because the mobile device is tied to the laptop and the mobile device spits out GPS data. So yeah, they might not sell data that says this is John Doe, but it's John Doe and we know where he lives, where he travels, when he travels, etc.