Technical question

Does anyone know how to track where hits on AO3 come from?  One of my stories has suddenly started getting a lot of hits.  (A lot of hits for me, anyway; usually I'm lucky if my fic breaks 500, and this one's now at 1350 and counting, despite being much more recent than most of the others at the top of the list.)  Not comments, because then I might be able to ask people where they found it.  Not kudos, either.  Just hits.  I've tried Googling, but nothing weird comes up, so I'm kind of at a loss.  Should I just be grateful it doesn't appear to have been sporked on some major site or part of some spam campaign and go about my life?

...I'm answering my own question, aren't I?