There are many different kind of cloud services, many are such that laymen have never heard of them. Let me list perhaps the five most known ones shortly without going too deeply into the subject. Note that some services fit into several categories, because there are different ways to use them.
- IaaS : infrastructure as a service
You can built your own virtual machine into a cloud. Great flexibility, a lot of work.
- PaaS : platform as a service
You built your application completely into a cloud. Gets one started easily. If you have heard about Google App Engine, it's a PaaS.
- FaaS : functions as a service
You built your application by calling functions that you or someone else have put into a cloud. Allows you combine best of both worlds. AWS Lambda, Google Cloud Functions and Microsoft Azure Functions are the leading brands.
- SaaS : software as a service
Ready to use software in a cloud. Some are cloud-only, some provide a desktop/mobile device interface to them. Google Apps, iCloud Apps, Dropbox etc.
- StaaS : storage as a service
Storage space for a user to use in the cloud. This is perhaps the most known category. Google Drive, iCloud Drive, Dropbox…
I'm afraid that there is no authoritative source, which would have gone through all things what you can do using cloud services and figured out what they should be called in Esperanto. This is again one of things only the community can decide by choosing how to call them.
I have never heard the word nubejo before, but it does make sense: a place in the cloud. And that appears to be the reasoning behind Komputeko's choices. As I see it, nubo could refer generally to the services and nubejo to the place. Therefore one could write:
Oni uzas la mallongigon StaaS (el la angla "storage as a service") por tiaj nubaj servoj, kie la uzanto mem konservas siajn datenojn en nubejon. Tiaj estas ekzemple…