At the end of the day I would want my game on as many platforms as possible. It's all money, end of the day.
This is why it still surprises me that DX is still even a thing in this day and age. That means that no one on OSX gets to play it or Linux and so on. I mean yeah, maybe very few Linux users would even want to run a game (because they are using it for anything but) but OSX? come on now that is millions upon millions of users.