Which RedHat subscription included the support of RHSS and RedHat HA add-on

Which RedHat subscription included the support of "RHSS" and "RedHat HA" add-on ?

I want to implement it and required support on it.(I know my current subscription does not included the support of "RHSS and RedHat HA")

Furthermore what is the difference between RHSS and Redhat Gluster Storage.
Thanks in advance.