Can you elaborate? Not at all a doubter here of what you're saying... could just benefit from a tl&dr as I'm not likely to sort licensing issues out on my own.
Just adds another set of pricing complexity on top of AWS's. Look at the pricing for either and you'll see the per-hour plus limits on vcpu or memory, charges for going over the limit, etc.
PCF is not licensed according to inputs (cores, memory). It's licensed by application instance -- ie, the output of what you bought from us. If you run one giant app with all the CPUs and RAM you can muster, that counts as one AI.
We like this model because (1) it roughly approximates the added value our customers derive and (2) it's easy to calculate without disagreement.
We do bill PWS based on total RAM-minutes, but that's simply because the existing hosted-PaaS market assumes that model. Our price for PWS is pretty close to what it costs us to run the bits on AWS.
Of course, I should emphasise, I do not work in the sales side of things, where prices can be discussed and Baldwin quotes abound. But I kinda like the sales folk in my office, so if you want to meet one, please email me.
Thus, I continue to wait for the big 3 cloud providers to figure it out. Unrelated, but seems like an opening for Linode or DigitalOcean.