Although the membership option page is required when you first set up your site with s2Member, in the end, it might not be needed at all, depending on how you might use the conditionals.
For example, I will have a page that uses ccaps and if you don't have the ccaps, it will display a sales page, but if the viewer has the ccap, it will show the content. The same could work with levels if you use them. This allows you to have several sales pages, depending on the content the viewer is trying to access, and how you have them available.
My site is http://scrapbookcampus.com and if you want a tour, just let me know.