Jester: the gnomes, of course.
Although that's actually a straw man. All the popular people remove this dropdown from their front site.
Okk: you're making it more complicated than it is. We don't actually need an accurate count of regular readers. All we need is a criteria which, when met, indicates that the person has a decent-sized population of regular readers. if
you have a consistent update-day average of 75 visits, then you've probably
got at least 50 readers. If you've got more, then you've got more, good for you. If you get an update day with only one visit, then, well, it's not consistent, is it?
The search string will be, of course "britney underaged hot newt college thermos".