To create multiple subscription levels which grant access to different content depending on the purchased plan, you start by creating Member Groups.
Select My Members in the left side menu then Member Manager from the drop down menu.
Click the Manage Members button.
Enter the names of your member groups in the text box below - add each group on a new line.
Do not edit or delete active member groups. This will disrupt member access to content.
Assign content to member groups
Articles can be assigned to be viewable by specific member groups. At the bottom of each article page, is the Allow Access setting.
After selecting an article to be Viewable By - Members Only, you can tick which member group will have access to the article. Leaving this option blank will allow access to all members.