I'd have to agree with you. From a company's view, it isn't a top priority, nor should it be to be honest. I, personally as a Linux user, would like to see that change. Coding for one OS is easier and cheaper and still generates a hell of a lot of money considering the monopoly MS has.
If enough people show their support it might become a common thing to see Linux ports. I would very much like to see that.
Edit: The dev's are probably looking at this saying "Damn it! He's trying to make more work for me!" "