But this assumes the thing does not offer greater value to you in return. In that case, why are you paying for that service at all?
I think the first part of the article made an excellent point about this, which was that if you're going to price based on a value metric, that metric should be tied as closely as you can to the quantifiable value you're providing to the customer, preferably something that is practically measurable or, if that's not viable, a proxy that is a reasonable approximation.
I think the bigger problem with value metrics is, as others have already noted, that they have to be readily understandable. I know plenty of people whose businesses no doubt could run on AWS, and possibly cheaper than their current hosting arrangements, but they won't go anywhere near it because of the complex pricing model and/or the lack of facilities to cap the spend in case of accidents or abuse.