They were essentially related to posts at the time, as merits were not round, and were pretty interesting it seems (I find the "time of day" stat stood-out on it’s own, as a means to try to derive the area of origin of a given profiles).
This would have been a very good tool for Alt account busters.
Like user static page, a lot of other profile options are not in use anymore like msn and icq, my question why they are still shown in the profile page? I guess, technically, it's not that complex to remove them.
I think Theymos is reluctant to make any further changes in the current forum software especially if it's not something of high priority. Many people have made lots of suggestions but nothing has been done.
This is what he replied when the same issue was
discussed back then in Meta:
What similar things do people use now?
Those fields are actually built a bit deeply into SMF for some reason, so it's not completely trivial to change, but it can be done. Low on my to-do list, though, as hugeblack mentioned.