Comment by II2II

> I am still surprised most Linux Distros haven't changed their package managers to allow for selling of proprietary solutions directly, fully opt-in by default of course.

One of the advantages of open source software is the ability to distribute said software with relatively few restrictions. It simplifies life for the maintainers of Linux distributions, those who manage Linux systems, the end user, and software developers. Making a package manager a retail product store would complicate things for everyone.

That said, the only thing preventing the distribution of proprietary software by most Linux distributions is policy. If a distribution wanted to do so, and the vendor's license allowed for permissive software distribution, they could do so. The vendor could implement their own mechanism for selling and distributing license keys. The advantage to them would be using a common software distribution method without having a middleman taking a cut. (Think shareware, or even physical software that included a license key.)