No, bell-cot's point is that they are the same company that gets the profits from the payload. It's vertical integration (pun accidental, but not avoided). That gives them a massive financial advantage as a launch company. It makes it hard for anyone else to compete with them - if they have the capacity to handle all other customers' launches as well as their own.

Internet satellites... that does look like a monopoly, or at least effectively one.

No, but the government could nationalize it and spin it out again.