[zahlman]

The "as read only" options produce an HTML document that lacks the editor features - when you open that file from your computer, you'll see static content (although it just changes a couple of HTML attributes and leaves all the JavaScript in, inactive). The normal options re-create the entire page - editor, content and all.

[nextts]

But why is that useful? Just do what Confluence does. Read only, then click a pencil to edit.