Oracle for ages, and Red Hat had made changes in the last to make it more difficult for Oracle (something about the kernel patches).
Rocky more recently, CIQ had been selling support contracts, including a well publicized contract at NASA very recently for a few workstations.
If it was just AlmaLinux making a free clone I’m not sure if they would have made the change or not. Obviously they got rid of the original CentOS so it might have still been on their minds. Also, they were doing a lot of packaging and debranding work to enable this that was no benefit to Red Hat, so it may have been a matter of deciding the cost and resources was more than they could justify, especially when it is essentially putting the code in yet another, third place (Stream, customer SRPMs, the git site).