The subtle point of my response was that you can't price internet connectivity the same way you price a physical commodity. There is a real cost associated with purifying water or generating electricity that is easy to measure. The cost structure associated with connectivity is very different. For the physical utilities, you have a significant fixed cost and a relatively large marginal cost. For something like connectivity, you have an significant fixed cost and a relatively small variable cost.
If I leave my tap dripping all month and use 100 gallons of water, the cost to the utility is the same as if I used that 100 gallons all day. The same is true of internet connectivity, except that bursts of usage can have a much more dramatic impact on the end user experience (both for me and for other customers). That doesn't appear to be the case for water/sewer utilities, and only seems to affect the electricity market during periods of extreme weather or extreme manipulation (e.g. Enron).