Don’t think for one minute that CSPs have billing and, more particularly, ‘bill shock’ issues all to themselves. The move to ‘smart metering’ for some utility companies in the USA is proving to be a minefield. According to Wikipedia, a smart meter is an advanced meter (usually an electrical meter) that identifies consumption in more detail than a conventional meter; and optionally, but generally, communicates that information via some network back to the local utility for monitoring and billing purposes...