With your type of argument, a 12 oz. bottle of water would cost 7 cents at the vending machine.
Cost = 7 cents
wholesale = 30 cents
retail = (depends on location/captive audience) 1.50 to 5 dollars.
Comcasts new hotspot (ay my house) could cause loitering, may not be as secure as they hope, interferes with my usage the same as me having too many connected devices of my own. I should get to decide the fair value, and charge Comcast what ever I want. ...as they do to me.
I've had the same voice/cable modem since I moved into my house (7 years ago). This year, the rent of the modem went up from 7 dollars to 8 dollars, per month.
The router is becoming outdated, yet they want to charge more for it even though I've payed them enough to have bought it outright.
I realize I am the sucker in this situation. I'll be switching to Verizon Fios due to that last straw. Yes, I'll still be a sucker. there is no other option.
So, this is not so much "on principle", as "fair" according to how Comcasts acts. I should be negotiating a 1 year trial where they pay me $30 a month. I'll boost that price there after as I see fit.