Earlier quoted context omitted.
What about blender, vlc, and Firefox?
Firefox and Blender have significant commercial investment behind them to keep them maintained. And they both started out as proprietary. VLC I don't know about. The fact that there are so few successful, non-programming examples exactly demonstrates the point.
It instead was mostly developed by a schizophrenic Austrian math genius in his free time from not being regularly employed, plus some other grad student types.