IBM leverages the hell out of open sources. They had that 1 billion dollars investment into Linux back then but they reaped massively from servers/mainframe, s

IBM leverages the hell out of open sources. They had that 1 billion dollars investment into Linux back then but they reaped massively from servers/mainframe, services, and projects riding on the free OS, while they saved on R&D/maintenance on AIX and others.