I don't know the details, but Knoc is a very old member, one of the reasons he's got so much post count is cause he's a Global Mod, checking around. Like he said, if he doesn't have 60 posts a day, PA will explode...(something like that)
The Green Mods aren't as active these days, sometimes they are and sometimes they aren't.
They already changed the Thanks from 1k to 3k and might change it again but I don't see the admin changing the Post Count cause it's already hard to get 3k.