How so? It certainly seems like it's a combination of high cost of entry and Comcast's ability to take a regional loss to drive out other competitors that's granting them a defacto monopoly. Also known as market forces.
Those cable lines that run down the streets into all the houses. By law nobody can use them but Comcast and by law nobody else can string up another set of lines to run to all the houses. That's the monopoly privilege.
