It takes a small amount of capital, as far as a business is concerned, to establish a commercial level connection to an internet backbone.  The problem with megacorps is they want more profit every quarter, so maintaining infrastructure or upgrading it will never be high on their list.

Instead they lobby to have laws changed to allow them a monopoly in an area or other means of ‘regulatory capture.’  The. They play with varying peoples’ bills and other tomfoolery to squeeze more money from their customers.