This is actually not true. Smaller cable companies (so anyone smaller than Comcast) traditionally make very little if any profit on cable TV. The entire cost of the cable TV package is made up of the licensing and distribution fees charged by the studios. A (will remain) unnamed provider in the northeast region actually looses money per cable TV subscriber so they can stay competitive against Comcast. They're very excited for the day they can drop their Cable TV packages entirely and solely become a pipe.

I subscribed to Direct-TV-Now to save money on television but then hit the bandwidth cap of Cox Cable internet and so now I pay an extra fee for unlimited bandthwidth. I never realized there was a cap until we had multiple tv sets streaming HD video on top of other Internet use.