Bandwidth != Total data used. The ISP needs to build infrastructure to support peak instantaneous load. If the current network is at 50% capacity and I turn on

Bandwidth != Total data used. The ISP needs to build infrastructure to support peak instantaneous load. If the current network is at 50% capacity and I turn on Netflix there's basically no cost to the ISP, even if I've already used my 1TB of data for the month. If they are at 95% capacity then things start to matter a lot more. If the ISPs were interested in fair pricing, they should offer pricing like the power companies these days, charging more during the day/evening and less during the night when less people are generating traffic. You should be throttled during the afternoon when everyone else is on or pay for the "fast lane". But they don't operate like that, because $, making them the bad guys.