You're referring to only one aspect of common carrier status. There's a whole host of regulations that apply - or not - if you're a common carrier.

And I'm sorry are you honestly claiming that those cost 20% of an internet bill? Because of so you're gonna have to cite a source for that one. Between your selective choice for what you claim is CC status, combined with a claim that a $50 monthly bill is $10 attributable to CC, makes me think you're pushing an agenda rather than sharing facts.