You’re being dishonest, bearing false witness on Red Hat’s historical business practices. The only completely free “code” they made available was uncompiled, which is completely impractical, for anyone to compile that code for each individual file on their own, and have a working O/S.
That’s exactly why CentOS was created, as you and anyone with any real knowledge on this subject would know - because you could NOT legally download the Red Hat O/S files without a support agreement. The most RH offered was a 30 day trial for free.
There’s countless articles out there like this one that are exposing what you are trying to cover up. Maybe you or a company you worked for had some special arrangement, but the average person had to pay to download and use Rad Hat for more than 30 days. Even now the terms of use are extremely limited.
https://www.linuxquestions.org/questions/red-hat-31/want-to-download-rhel-5-a-624311/
https://www.cyberciti.biz/faq/where-do-i-download-red-hat-enterprise-linux/
https://www.cyberciti.biz/faq/where-to-get-redhat-enterprise-linux-installation-number/
https://www.linuxquestions.org/questions/red-hat-31/how-to-download-rhel-4-ws-337281/
https://superuser.com/questions/15602/is-there-a-free-as-in-money-version-of-redhat-linux
Etc…
First--I don't lie. I tell the truth as much as I am able.
Second, all of your links refer to opinions of people, who likely never researched the topic well enough. Red Hat did make the downloads difficult, and hid the links pretty well--but they were there.
Third, you are the one being dishonest--or at least disingenuous. The earliest link you listed was 2005--less than 20 years ago. By that time, I was already on Fedora full time. I will amend my statement, though, to about ~25ish years. Getting old sucks, and time moves by quicker than I realize.