I have granted permission for someone to look at my website and why I am unable to add pro-course plugin. No one responded. I also have concerns about plugs that are advertised as so useful yet there is no tutorial or end to end guides to use them. For example, the pro sites plugin has a half done tutorial but never show how to make the checkout page available publicly. How do I make my check out page for pro-sites public, so that visitors can access it and buy subsites? How can offer a free option, combined with paid options for subsites of the multisites?