[pdonis]

In other words, there is no technical reason why it's any harder for Comcast to "route traffic to the customer's house" using the same arrangement as other ISPs. The reason it doesn't is that it's trying to get paid twice for the same traffic, which is a "business" reason (at least for some value of "business"), not a technical reason.

[irishjohnnie]

Yes, "trying to get paid twice" is what "extract more rent" and "rent seeking" means in other replies including mine.