said by N3OGH:
If an ISP is imposing a cap, they should provide a way to monitor it.
You wouldn't pull up to a gas station, fill your car and then ask the price, would you?
I also wouldn't trust my local Telco to be honest (or objective) about my consumption. Hopefully just like your gas station analogy there will be some independent auditing to ensure the meeting is uniform/valid.--
You've glimpsed the fist within the Bene Gesserit glove. Few glimpse it and live.