One may argue then that an ISP could offer a service that bans the Bittorrent protocol under the argument that they want to prevent abuse of an otherwise unlimi

One may argue then that an ISP could offer a service that bans the Bittorrent protocol under the argument that they want to prevent abuse of an otherwise unlimited connection for only $70/month to connect to a filesharing website that saturates the connection 24/7/365. In fact, that's basically what started the entire Net Neutrality debate. Comcast got busted messing with the bittorrent protocol, got slapped by the FCC for it, but then got the rules overturned in court. These new rules replace the old principles. And the new rules are clear: if you are selling broadband, you allow any legal service, application or device. If something is messing with the network, deal with indvidual user on a protocol-independent basis. If a kind of protocol is congesting the network, like say streaming video, then you may throttle ALL kinds of streaming video, inlcuding your own. Simple principles that Google used to believe in. And Google doesn't get to ignore the rules and escape criticism just because Google Fiber is cool. Principles matter.