Actually, we do not have such licensing in place and we do not plan to introduce it.
The Nextedy Polarion Add-ons licensing is based on size of the Polarion deployment, the more users are on the server, the bigger is a price. We consider this simple and fair.
How is it implemented?
We count all active users on the Polarion server, i.e. we count users with global role "user" as this is how the "active" user is defined in Polarion.
If you have any questions or concerns, please contact us at firstname.lastname@example.org.