Otherwise, there are thousands of small open source companies that do quite well for themselves. If you look at pure profit however, Redhat does abysmally compared to say Microsoft or Apple, or any traditional proprietary software company. Due to this, the valuation for a purely open source company have to be lower which prevents a lot of the VC funding frenzy for "the next unicorn company". If you want small and sustainable OSS can work. Otherwise, Redhat is the black swan in that they pulled off something thought to be impossible.