Statistical multiplexation of the service rate (bandwidth) is the inflection for cost to the consumer. On most SP networks, if aggregate user constant load utilization increases past 10-15% committed rates, the cost model must bear service load into account.
There are several possible business models: Charge every customer the same amount, charge per Mbps, charge per GB, etc. I don't think there's one "obviously correct" business model.
it's not to say that there is one obviously correct model, but to say there are clearly very incorrect models.
While portions of the public want to buy 'unlimited' service, the only way that 'unlimited' service can exist at rates not deemed unrealistic is if most users of the 'unlimited' services do not create heavy usage. It's a tanstafl issue; once everyone is a heavy user, the subsidy created by uneven usage no longer exists.
Statistical multiplexation of the service rate (bandwidth) is the inflection for cost to the consumer. On most SP networks, if aggregate user constant load utilization increases past 10-15% committed rates, the cost model must bear service load into account.