Agreed. They don't want to reveal what a count query on their DB shows for nationality=US
And like the others I suspect they also have a "Plan B"
OTOH this won't be legal under the FISA court.
So if someone blows the whistle on them it's a)Completely illegal or b)"Legal" under some other piece of BS legislation.
It's not a policy decision.
It's a disease of the mind.