Your free version should in theory just be a freemium version of your product. And your freemium version of your product should lead to paying customers and be a major way of generating leads and customers. If it's not doing that then it should be a case of do you need to stop adding so many features to the free version or is it that a free version just isn't used by enough people to even matter?
If no one is using it, then really stop building it you're just wasting your time just so you can virtue signal that it's open-source. Really, the only people who will be mad will be the ones not helping you out.