That's what made Windows such an attractive platform. It wasn't Microsoft. It was the fact that there were hundreds - thousands of companies supporting it. I think that it would be wrong to single out any Linux company. Q - Today most of the IT companies are embracing Linux.
People expect other people to be nice and take care of things.
The power of Linux is that even if nobody else helps you an inch of the way, then you still have your copy of Linux, you still have the power to do whatever you want. In that sense, even if a commercial company were to give back nothing at all, it would not be a loss for Linux. Even with a company like Dell which doesn't do any Linux development, just the fact that they are there, supporting Linux, helps. Just the PR value of it is great. Dell and IBM have been very good at causing other hardware manufacturers to make sure they have drivers for Linux.