I had noticed that link, but assumed it was for pointing out errors such as the wrong address, wrong URL, or wrong description, as per the options in the drop down menu which appears when you click on it. Perhaps additional options such as "Does not accept bitcoin/crypto" and "No longer operating/no longer exists", would make things clearer. Or perhaps I'm just being a bit dense.

I've also notice quite a few sites which have no feedback left, but still have a numerical rating. How are these calculated?