Earlier quoted context omitted.
I checked Comcast's 10k report and their margin for the segment including broadband is over 40%, which is crazy but about what you would expect from a de facto monopoly. I don't think forcing them to invest in capex to benefit customers is asking so much when they are making those kinds of margins.
Those margins are misleading because they're _multi_ service operators, and accounting standards require that you can only list direct costs. Revenue is easy: how much did you take in for video? phone? Internet access? Costs are harder because you can only include business line direct costs. Since the cable plant is used by voice, video and data services it's not a direct cost of any of them. Same thing with the serv…
Like 40% of the segment cost is "programming" (TV), so the internet part of the service likely has even better operating margin than the segment overall (basically, slightly higher revenue than TV with considerably lower costs).