Richard M Stallman wrote:
Maybe for the same reasons IBM and SUN are doing Linux, despite the fact that they had their own OSes.
What they are doing is the GNU/Linux system, not Linux by itself.
See http://www.gnu.org/gnu/gnu-linux-faq.html for more explanation.
Thanks for lecturing me, Richard. I think your opinion on this is widely known. I hope you got the point anyways.