How to disable paid features in Tracker
To stop using paid Yandex Tracker features, revoke full access to Tracker from your employees. If no more than 5 users have full access, Tracker can be used free of charge. For more information, see Pricing for Yandex Tracker.
On the top panel in Tracker, click → Manage access.
In the All users section, find the employees to revoke Tracker access from and select Read only in the Access column.
After you revoke access to Tracker from your employees, they won't be able to create and update issues. They can still view information in Tracker.