> But they don't even need to do that - they just approach an existing adtech company with a FISA warrant and get their data. Depending on who they approach, t

> But they don't even need to do that - they just approach an existing adtech company with a FISA warrant and get their data. Depending on who they approach, they won't even need a FISA warrant because in the US information voluntarily given to third parties has "no reasonable expectation of privacy" [0] [0] https://en.wikipedia.org/wiki/Third-party_doctrine https://en.wikipedia.org/wiki/Third-party_doctrine