Nobody is taking anything back. If your contract with RH stops you lose access to their servers and cannot download their binaries or their source anymore. You can freely share everything you managed to download.
Clearly Red Hats thread of cancelling the support contract is intended to discourage source distribution. The point of the GPL is to ensure source distribution is possible. These two goals are inherently opposed.
I want to give Red Hat the benefit of the doubt here until we see them acting otherwise in practice.