Well, becoming a member, you start with the free membership.
A free membership account gives you access to more content only available to members. The content is updated and extended regularly.
Additional member content could be blog posts as well as downloads of e-books or template files, to just name a few options.
Of course, already registered members will be informed first about any new content and membership options.
On top of the aforesaid, as a member, you have access to group-coaching add-ons when you engage with one of the available courses.