Even if all software is open-source (which I doubt), that does not mean that nobody can earn money from it; there are still ways to earn money, too. Others: M

Even if all software is open-source (which I doubt), that does not mean that nobody can earn money from it; there are still ways to earn money, too. Others: MS-DOS / PC-DOS -- FreeDOS ZZT -- ZZT (the source code was rewritten to produce the same executable file; the original source code was not made available) MESH:Hero Hearts -- Free Hero Mesh Windows NT -- ReactOS BTRON -- B-Free (incomplete and seems to be abandoned?) (And, the above are definitely not all)