Basically we allow users to make their own personal editable copies of the Cloudbook. When you "Run", it is first replicating the Cloudbook into your account and then running. You can edit the code in your copy without affecting the main Cloudbook. Free unlimited CPU, RAM & Storage gets included with every Cloudbook for you to make continuous edits and perform repeat runs, including long running run operations.
Not sure how we can achieve this without a registration. Do you have something in mind?