That's the point: if they don't want to contribute their changes back, they should spend their own money writing their own software.
Right now, they'd take thousands of hours of effort from the community, add a few hundred of their own and then close off the product from the very community that they so willingly took this charity from. Yay BSD license!
If they had to use QNX or similar, they'd pay to do it. If they had to use GPL, they'd pay to close off their changes, which would be great for funding more free software.
> For better or worse, all the big console manufacturers see their ability to lock down their platform as vital to their development and business strategies. Vital to their ability to charge $60 for a few gigabytes of 1s and 0s.
Well that's why I divided the licenses into "pro-user" and "pro-corporate". The BSDs are pro-corporate.