My 2 cents – and you can keep the change:
I agree with ‘ioplex’ that IBM/RH does have a right to do whatever they want with their commercial product - that said, I also think IBM/RH may be experiencing some financial challenges as it has been reported that growth at Red Hat the first quarter of this year was the smallest increase since IBM acquired Red Hat in 2019. IBM/RH also laid-off roughly 700 employees in April.
I think that this was good cover to justify a move that IBM has probably been considering since it acquired Red Hat.
It also brings to mind a situation nearly 20 years ago that lead to a series of legal disputes between SCO Group and Linux vendors and users which ultimately lead to the demise of SCO
I think it’s too early to declare that the sky is falling, the Linux community is very resilient. And yes, it very possible that something better than RHEL may come from all of this.