Why should I use Red Hat Subscription Management?

Issue

• Why should I use Red Hat Subscription Management tools for managing my subscriptions when RHN Classic works just fine for me?
• What is Subscription Management and what is need to use it?
• I would like to register my RHEL7 beta machine for subscription. I have requested for a subscription and received a install key, etc. However, when I attempt to do the rhn_register, I only get a menu for the satellite server. How do I set my machine up to utilize the beta subscription?
• Want registration for RHEL server beta subscription. Do I need to use subscription management to register my RHEL 7 beta machine for subscription?