Is Nephele an “easy to sign up and difficult to cancel” model, or can we discontinue using Nephele and switch to our own hosted Orion server without losing our data?

Data is owned by you. You may selectively export and download your data at any time while your subscription is in effect. Should you decide to cancel your Nephele service and host Orion yourselves, we will provide you with access to your database, which can effortlessly be migrated to your Orion server installation. Of course, you will still need an Orion OEM license in order to host the Orion server.