Hello, I'm Chris Burgess I work for RM Education looking after our support products and wanted to stop by and provide some answers to the questions in this post.
As others have correctly said, legally you can have CC4 installed without purchasing the support service. However, by having support you do have access to our very experienced team, access to our knowledge library and to our feature updates and bug fixes. This can help give you and the school peace of mind that you've got CC4 experts on-hand and help to keep your environment up to date.
I did also want to share that our support service isn't limited to RM IP as we offer a single support contract with over 50 leading technologies that cover the main network platforms in schools (vanilla windows, google, apple).We're helping a number of schools go completely Google and some of our new technologies use the Microsoft's Azure platform. If you want to know more, take a look at our support technologies list, review our website or PM me and I'll be happy to help.
Thanks,
Chris