Users install from there, so long as they're using Linux, a Debian or Red Hat based distro, and have sudo access. As you say, not such a nice answer.

For certain kinds of software, this approach is getting more viable, thanks to containers. In some contexts, you can tell everyone to run your software in a container with a specific Linux distro inside. But that software is often distributed as container images directly, rather than distro packages to be used in containers.