Huge Increase In Website Visits

Not sure if this helps anyone, but my website saw an increase of several hundred hits from all over the world because of a single link in the comments section of a photo posted on reddit.com. 

I'm sure the site has rules against marketing, and it mentions that comments must be 'relevant'.  In my case, the pic was a zombie fortress floating in space.  Since my novel is a sci-fi, horror, zombie novel, I guess it was relevant enough for someone to post a link in the comments section.  

I didn't even know the place existed until I woke up and saw all the increased traffic and tracked it back to that lone post by a mystery poster. 

In short, I don't know if it helps anyone at all with promotion, and I'm not planning on trying to sneak in a link on the site just for the heck of it, but I guess it's certainly out there if you're lucky enough to have relevant content.  Some of the visitors to my site actually spent a good deal of time on there.