This is why I made the distinction "open-source based". The project isn't simply rebranding though, it builds solutions for customers based on open source components (which is a step in the correct direction). I would like all the repositories to be public, too, but we're not there yet.
I saw on phoenix-werkstatt.de that there are actual contributions back upstream. Even if it appears to not be a Dataport employee, at least some of the funds of the government are going towards improving the projects for everyone. Good stuff.
Unfortunately, at the moment even code access for other public institutions is buried behind many layers of bureaucracy but I have been promised they will start to open up soon enough.