"They can man-in-the-middle the traffic" could be interpreted as them having to actively do something to become the man in the middle, when they already are. I

"They can man-in-the-middle the traffic" could be interpreted as them having to actively do something to become the man in the middle, when they already are. It's likely they just do sampling (think netflow) to get some statistics over the data that's already transiting their network.