Don't confuse acquisition cost per paying customer with build cost per address passed.
FTTH yields take rates of 30 percent - at $4K/address, thats around $13K per customer.
Charter bought on the cheap.
And yet ANOTHER reason why Verizon jacked up rates.. now $94.95 for entry-level triple play and climbing (Price is right yodeler continues climb up mount Verizon) Sure, price is right for shareholders and profiteers... PFFT!!
My nose is wrinkling. If its $4K/sub, not per address, VZ would be foolish to quit; rents on the 30% take rate (premium buyers, immune to price), minus the union overhead, should be sufficiently attractive to continue expansion. While LTE will be a competitive threat, it won't affect the Fios set.