Genuine question (I'm not intimately familiar with all the terms of the GPL) -- does the GPL require you to release the source code to anyone and everyone (even non-customers)?
No but it gives every customer the right to redistribute the sourcecode to software they bought if that code is covered by the GPL under the same terms as RedHat got from their upstream.
It looks like RedHat might be trying to avoid that clause by threatening to stop selling any software to people who might use that part of the GPL.
