Effective Monday 31 July 2017, the new Atlassian cloud pricing strategy includes switching from a tier-based model to a per-user model and will affect monthly cloud customers of Jira and Confluence. This means that Marketplace add-ons for these products will also be switching to the new model as they are aligned to the parent product, so this change affects customers of Behave Pro Cloud.
Please refer to the future pricing strategy for Atlassian Cloud.
Details of Behave Pro pricing can be found here.