That makes sense if it's just you, but you must be losing a lot of potential contributors by not being on Github, let alone not using any version control. Are

That makes sense if it's just you, but you must be losing a lot of potential contributors by not being on Github, let alone not using any version control. Are you just not that interested in contributions from the public? If so, I think it's possible you're greatly underestimating community interest in the project.