Scott Alexander has a decent article (or rather a guest blog post) at https://www.astralcodexten.com/p/all-lawful-use-much-more-th... that brings up the subject in the context of Anthropic and OpenAI's dealings with the Department of War (sic), and how their contracts with the DoW might be interpreted with regard to mass surveillance of Americans.

Worth checking out. I'm not personally knowledgeable enough to vouch for the veracity, though.