[Veuxdo]

Atlassian Marketplace does this for all their 3rd-party apps, e.g. https://marketplace.atlassian.com/apps/1229877/ilograph-inte...

You can put in any number from 1 to 50,000 users and get an exact quote. This is possible because there's zero additional setup for an app already in an ecosystem like this. Compare that to onboarding an enterprise to a SaaS solution, or an on-prem solution, which could be a significant amount of work depending on many factors.