You discriminate by partitioning up your bandwidth. Like they always have done. Data is free, bandwidth is not. You partition the bandwidth you have with a cert

You discriminate by partitioning up your bandwidth. Like they always have done. Data is free, bandwidth is not. You partition the bandwidth you have with a certain overbook factor and sell that. The Comcast cap has nothing to do with technical decisions, it is purely there to discourage video streaming in favor of Comcast's own options.