Because they aren't telecommunications common carriers. Telecommunication, AFAIK, is commonly meant to refer to, as Wikipedia puts it, communications "through e

Because they aren't telecommunications common carriers. Telecommunication, AFAIK, is commonly meant to refer to, as Wikipedia puts it, communications "through electrical signals or electromagnetic waves". Using a transitive argument to call the named services as such rests on the argument at hand about differentiation between content and medium.