This way the plug-in will be available for download from the Creative Cloud, right? If so, I think the "offline" installer is a better fit for my task, as I have more things to install in addition to the CEP extension.
It seems as though installing extensions for Creative Cloud applications, on systems without Creative Cloud installed, would be a pretty narrow use case.
The Adobe's GitHub repo mentions the enterprise console as another way to distribute ZXPs. I'm not sure I understand the process, though: is that a way to release packages internally/privately, between members of an organization?