Could probably get a lot of actionable military information about troop locations by running targeted ads for subprime auto loans and divorce lawyers and collecting location information, discarding any US locations.
Oh, this is an old trick the US has used for a long time:
https://www.wired.com/story/how-pentagon-learned-targeted-ad...
Or Kalshi bets.
https://www.justice.gov/opa/pr/us-soldier-charged-using-clas...
Or run tracking.
https://www.theguardian.com/world/2018/jan/28/fitness-tracki...