This change means that we, as builders of a RHEL clone, will now be responsible for following the licensing and agreements that are in place around Red Hat’s interfaces, in addition to following the licenses included in the software sources. Unfortunately the way we understand it today, Red Hat’s user interface agreements indicate that re-publishing sources acquired through the customer portal would be a violation of those agreements.

I think this interpretation of Red Hat’s agreements is not correct, or at least it doesn’t apply to all off RHEL. I couldn’t find any mention of not being allowed to share the source code within the EULAs either.
Since Red Hat doesn’t own the copyright to the majority of the code in RHEL such an agreement would violate a lot of contributors’ copyrights since Red Hat would effectively re-license the code without the consent of the copyright holders with such a clause.