Everyone is missing a very big point Google fiber in Kansas City is not a business model, it is a test. If it was setup as an actual business that was trying to expand and be profitable they would not be charging 70$ a month. The folks in Kansas City are lucky at least for these first two years. If google decides to pull out, which their insane contract lets them do, Kansas City might have a problem.
It would be similar to a Kansas City Dealership offering Ford Mustangs for 5,000 dollars it doesn't matter if you need them or not you would not buy it cause its a amazing deal and the rest of the country would be jealous and mad that their Dealerships cant offer the same thing.