To be clear: Red Hat is a $billion business that is purely Open Source (nothing they sell or do is not open source, and when they acquire things that aren&#x27;t open, they open them within weeks or months of acquisition), which is pretty amazing.<p>I&#x27;ve been involved in Open Source based businesses for almost two decades now, and I still don&#x27;t grasp how to build a billion dollar business on entirely open source software (though I&#x27;ve made a decent living at it most of that time). But, I stubbornly keep trying.