That's pretty much what I've heard about their mass data collection projects: they're absolutely worthless at actually detecting an active threat like some little neo-nazi shit psyching himself up to go do a terrorism, but they're an invaluable database when it comes to creepy psychopaths in the DoD wanting to tailor search queries to find vulnerable women to stalk or the feds wanting to identify activists and decide which ones they want to persecute extra-hard instead of the usual "lmao just let local cops beat them senseless" level of repression.