John, great question!
Where other CMS products focus on managing content, our program expands on that by providing an equal focus on the members area itself.
The product information page on our site goes into more detail but possibly the best example can be found here -
https://www.elevatedx.com/boost.php
In addition to this we have a template system that uses XSL, making it possible for a pay site operator to manipulate every item on every page, literally. You can build a site where no 2 pages are alike, each page includes a different upsell, content format, etc.
The system has so much flexibility that when it comes to setting up a pay site we can handle any configuration and design you can dream up.
In other words, it's extremely powerful.