Because monetizing your open-source project means you take on a second job. Here are your choices: * Turn your OSS project into a company (Docker). The pro is that you can capture a lot of the value, the con is that you're splitting your project into CE/EE and also now you're a CEO * Give the software away for free and charge for the hosting (Gitlab). Pro here is that you get recurring revenue, but the con is that no…
Well if you monetised your OSS maybe you wouldn't need your first job, maybe you could just work on projects you actually wanted to.