We're in the process of monetizing an open-source project as well (Klaro - https://github.com/kiprotect/klaro https://github.com/kiprotect/klaro). The project s

We're in the process of monetizing an open-source project as well (Klaro - https://github.com/kiprotect/klaro https://github.com/kiprotect/klaro). The project started as a "weekend hack" for our own website and became quite popular over time, to the points that it's used on thousands of websites already. We plan to keep the client software (i.e. the part that runs in the browser) open-source and feature-complete. We want to charge for backend services (managing consent data, scanning websites) and comfort features like a graphical configuration editor. That way we hope to enable users to still get great free value from the open-source version while allowing us to raise money for the development. Contrary to some other voices here we had great community contributions to our project right from the start: For example, almost all translations are contributed by the community and even some of the non-trivial features have been built by community contributors. That said it's a rather simple Javascript project and we try to keep it as accessible as possible. We have another open-source project (KIProtect - https://github.com/kiprotect/kiprotect https://github.com/kiprotect/kiprotect - just open-sourced it last week actually) which is way more complex and that we also want to monetize, we'll see how many contributions we'll get for that.