Gregory's Server
Reminds me of a reddit-post where a smallish game developer noted that while their game sold a fraction on linux than it did on windows, 95% of bug reports came from linux and almost all were applicable to improving the windows-version. Better yet: the bug reports were detailed and easy to replicate.
So they upkept the linux-version not for the sales, but for the feedback that allowed the improvement on Windows -- which in turn led to sales.