You are right, that encryption would be a problem, but you'd still get a giant amount of unencrypted traffic. Also, not every company is a US company. I doubt

You are right, that encryption would be a problem, but you'd still get a giant amount of unencrypted traffic. Also, not every company is a US company. I doubt that costs for such an operation would make any difference to the US government, considering how much it is spending per day on its military.