A Question about Subscription

I want to know the differences between these two part numbers : MFG#: RH00763S and RH00763
RH00763S is a life time subscription?
what happened after the subscription period ends up?
and I wonder to know what's the version of RHEL provided with this? I'm looking for a RHEL 8.0 edition
And actually I have a 30 Day Evaluation of Red Hat Enterprise Linux for SAP Solutions, but I think I need help to obtain it , because I assumed that the Subscription will be given through an OS but there's no where in my dashboard to download it.
and after all how can I purchase this subscription directly from Red Hat?
Thank you in advance.
Regards