I would rather have the CPU+memory concept as well. But I think you’re running the applications on the customers’ cloud accounts, right? In that case, if you want to stick to value-based-pricing, I would look at the amount of users the customer has rather than amount of containers. The latter depends upon the complexity of software and the choices of architecture, rather than “value” gained from your product.
Having said all this, you have a great product and something like this has always been on my “dream list”, which tops my wish list. It always struck me as the ultimate form of immutable, throwaway infrastructure but I never had a proper excuse to build the necessary tooling to do this. Seems like you guys did, and I’ll be keen to give it a try!