We're not transparent about enterprise pricing since our costs on any given user are so country/business model/implementation-dependent. It's less that our sales team isn't willing to share the details and more that the models themselves are very complicated and change frequently. (Visa and Mastercard are both making big changes to their pricing this year, for example, and that will change almost all of them.)
Then shortly after, Stripe raised pricing on a model I'd just been told was grandfathered in.