There are many ways to innovate on your pricing metric to get a closer correlation with your value metrics and business model. Heathrow Airport provides an interesting case study. Note how they use different pricing metrics for inbound and outbound flights!
Tom Tunguz is one of the best informed and prolific of the venture capitalist bloggers. His blog is generally well researched and thoughtful. Worthy to be on your read regularly list. On May 9, 2017, he published a piece titled "The Challenge of Performance Pricing for SaaS Companies." This time, I think he got it wrong.