How do spammers find this website?

I heard years ago that Fluther has been made unpopular by Google, so it’s hard for an average person to see it appearing on the search result unless they deliberately search for it. And yet there isn’t a day when I don’t see a spammer here, even those in my country, who aren’t supposed to know much about an obscure website that has nothing to do with their immediate surrounding.

What is it about this site that attract so many spammers?