Cloud: The pricing for the Cloud version of the add-on is determined by the number of active users in Jira, irrespective of the actual number of users using the add-on. For example: If you are being billed for 250 Jira users by Atlassian, then the add-on will also be billed for 250 users, even if only 100 users are using the add-on.
Server: Server licenses are perpetual and the initial purchase includes one year of maintenance. Maintenance can be renewed, after the first year, for 50% of the current listed price of the add-on. The purchase price is determined by the current Jira user tier. For example: if you have a 500 user tier license for Jira, the add-on will also be priced for 500 user tier, even if only 100 users need access to the add-on.
Data Center: Data Center licenses are sold as an annual subscription (active subscription includes support and version updates). The pricing is determined by the number of users in your Jira instance. For example, if you're running Jira Software (500 users) then you should purchase the 500-user tier for the add-on.
All add-ons are priced and licensed separately from each other. To purchase an annual subscription or for any other questions regarding billing/subscription, please contact Atlassian billing here.
For additional details and pricing information for each add-on, please refer to the links below