> The company also noted it has never received a National Security Letter. Such NSLs are typically filed by intelligence agencies looking for company data. They

> The company also noted it has never received a National Security Letter. Such NSLs are typically filed by intelligence agencies looking for company data. They also normally come with a gag order preventing businesses from revealing their very existence. That means that if Nest ever removes its disclaimer that it hasn’t received an NSL, it likely has been sent one. Whenever I read copy like this, I read it as "no dragnet this time, nothing to see here! Keep buying Nest and other great products from Alphabet, Inc!" But is it possible that no NSL was ever sent and Google simply provides a data feed of all relevant info and video to their national security partners? (A generously paid-for feed, of course.) I guess what I'm asking is, is an NSL required for Google to legally surveil its customers on behalf of the host government? Beyond sheer EULA license legal weasel-wording, I'm wondering if the fourth amendment restricts the US government from arranging for a dragnet-style data feed from some willing corporate partner.