Well, you can't blame developers to not cater to their 1% player base. Especially since that group usually have the most problems and requires more development time.
I don't remember exactly who, but there was one game developer who was all praises for that 1%. The Linux users were the most prolific testers who sent back detailed bug reports with ways to recreate the bug, logs and often core dumps even. That 1% helped the devs, as well as the other 99%.
Market share and earnings are not everything.
We understand why game developers could not want to port their stuff, but the point is not to blame operating system that has nothing to do with it and focus trying to convience developers to support user-friendly systems at least out of principle even if it is not the most revenue generating decition.