Edit: just to clarify they are referring to things like "eBook teaching you how to make $1,000,000 a day by doing nothing!" type sales
That said eBay is specifically referring to the type of digital good that can be duplicated endlessly. A website is a single thing. You can run the software that runs it on another domain but you are not duplicating the site itself. Which is why I don't believe it would run afoul of this rule.