Why would a serious government not walk through the open door and take what they needed while their agents collect two salaries? It's just a win-win for foreign intelligence. They would be negligent in their duties to NOT infiltrate US companies with open doors and permissive, trusting internal policies about user data.

Then the company can do the liability minimization dance when the FBI comes and points out that they are running a cheap data service for foreign spies. "We, uh, had no idea..."