The GPL requires you to distribute the GPL source code along side artefacts generated from it.
Red Hat used to share everything with everyone, they never needed to do that. To meet the requirements they need to share the code sources with licensed customers. This is what they have switched to doing.
This is my problem with the GPL, it feels like a cult of personality built around Stallman. With people assuming its somehow a magical license.
Businesses largely treat GPL as libraries they don't modify (or legal gets frowny face) so they don't have to share their code.
The "less free" licenses are generally ok to use and modify (the WTFPL caused fun with legal in one job). If you modify an open source project its normally easy to build a business case/convince a client to upstream the changes.
All the Red Hat changes demonstrate is another step towards an Oracle/Microsoft licensing model. Which is a good reason to not use RHEL or Fedora.