To have more seats in your self-hosted workspace, you have to either subscribe to Team Plan or purchase a Installable Licese.
Simply go to workspace [License] setting panel to start
Team Plan is an auto-charge long term subscription. The invoices will be generated monthly or anually, with dynamic seats.
The Team Plan relies on an the Internet to check the available of license keys.
If you want to deploy AFFiNE in intranet, where access to AFFiNE's license certification service(basically the domain of app.affine.pro) is banned, you can purchase a Installable License and install it on workspace [License] setting panel.