From what i found online searching about it..

The basic thing that trackers would show about who might be visiting your MySpace or FaceBook profile is, a general location and/or possibly an IP address.

The only way some of them might give you more info is if the other person is logged on the site and had signed up with true identification.

And some tracker sites require you to sign in on them to get the info... some even ask for your details...

It looks like many of the trackers are getting blocked by both sites as they come up.

Some sites suggest many of the tracker programs are scams themselves.