I am amazingly focused right now!
I assume from your post that you've got a low amount of visitors?Question: Why calculate the number of visitors in the Profile page? It isn't accurate, because people who goes there only do very few things available.
Such as posting visitor messages, checking out profiles, and sending PMs. Just that (I think.).
If someone wanted to know how popular they are, why not ask the whole forums: "Do you know me?", "Have you got in touch with me?", etc.
In fact, I dislike seeing a lot of visitors visiting a profile, and claims that profile is popular. It doesn't improve social skills at all, because they're not meeting face-to-face.
Imho it's just for fun. You know, useless information. For example 'warm water freeze faster than cold water' -almost useless but fun to know. =)