Wozniak's Efforce energy efficiency token white paper

Not sure I fully understand this one, perhaps I missed it in the white paper.

The more traditional method of this is the investors fund the project and then the benefitting company pays the investors a portion of what they would have been paying the utility companies if it hadn't been for the upgrad project. It's not clear to me if that actually takes place in the Efforce method, does the benefitting company have to buy tokens to pay the investors?

Also, if all savings are calculated based on meter readings sent "directly" to the chain, how do you account for changes in energy requirements due to upsizing or downsizing or any other change not covered by the contract? A mechanism for this would seem to require a method of putting a thumb on the scale, and if that's he case then why use the token instead of the more traditional method.