[mrweasel]

> They can't easily do that without really risking to break the gpl.

Why wouldn't they be able to do that? Sure, they can't patch the kernel or any of the existing stuff, but what would prevent them from writing a Grub replacement or a Red Hat shell? It has to be free of GPL code, but the operating system as a whole isn't what's under the GPL, it's the individual components, some of which aren't GPL, but BSD, MIT, ISC or some other licens.

[toyg]

Red hat does a lot of work in kernel, subsystems, and libraries, where linking is necessary. They can, more or less, happily ignore the legal landscape as long as they stay open, because those licenses are interoperable; the minute they started closing things, they would have to pay a lot of attention not to break gpl constraints.

[rushikesh90]

The whole point of selling RHEL is everything is coming from community and open source and they are making money only for support. If they start closing even a bit of software, they will loose customers to other enterprises like Microsoft