Preventing Registration without CBSubs membership

Hi,

I did a bit of searching but didn't find anything that was helpful, and I'm sure I'll have a forehead slap when I hear the answer, but I'm looking to limit registration into a CB account for those that actively pay for a membership.  What are the options/settings in Joomla/CB/CBSubs to restrict this behavior? 

Thanks.

Create an exclusive plan so it must be selected and be sure it's set to display on registration. Next in CBSubs > Settings > Global adjust the following.

Show subscription plans at registration: Yes
Allow Free Registered Users (without subscriptions): No

This should require their account to always have an active subscription. When they expire they will be forced to renew to even be able to login. Registration also will require a subscription.

If you don't want the login blocking behavior then just having an exclusive plan with the following will work.

Show subscription plans at registration: Yes
Allow Free Registered Users (without subscriptions): Yes