I don't understand -- are you saying that a distro re-spin/customization is somehow an evil fork? Because that's not even a fork, IMO. Not in the slightest. They're just optimizing the OS for their specific platform. I'm sure they stripped out all RedHat trademarks because it's not an officially supported OS and they're serving packages from their own internal mirrors which are just alternative builds of the SRPMs.
Call me when they've actually forked *code*. Like massive changes to RPM/yum/dnf, for example.
If anything we should be mad at RedHat for forking the Linux kernel and having patches/changes that are not upstream in vanilla.
The FreeBSD AMI images are also different from the FreeBSD installation media, too. It's not a fork.