How do they determine if the person is a US citizen? I've sometimes wondered if my Google account is caught up in mass surveillance of non-Americans because I created my main email address while living in Australia, though I am a US citizen and only a US citizen. I haven't checked in a while, but I know that even in the US, checking my email on the web it would show that it was connecting to an Australian domain.

It was typically isolated in procurement, only buying data from "outside of the border" - data was packaged by geo regions typically