most active posts, most number karmas, most number of bookings, highest earnings (for the IRS, joke) for the month, for the year, all time. and so on.
Because?
If I want a pro-cuddler, I'm likely to only be interested in those who are reasonably close by. Knowing that there is a perfect-match pro-cuddler charging only $10 an hour on the other side of the world, isn't much help to me. If the Moon was covered in gold bars, they wouldn't be worth going to collect.