Some are very obvious. Bojo and one bar through five, for example.
NR is not obvious and I do not know whether, for example, that it only means No Comment rating. One puzzle is whether some NR kogs are trusted enough to see hidden comments.
Another puzzle is warnings. I have noticed that users without lifetime subscriptions who get warned get nosub. Lifetime subscribers may get warned without public notice.
My real question is not quite as simple and you can check for yourself.
Search/Go/Users/By Activity: Last commented/Sort twice by mojo
the result varies depending on the window you are looking at. I search for four sorts and they are not quite as obvious as you might think. On some days a four week window catches the NRs and the Bojo.
New NR users are interesting and rare. Old NRs with fresh posts are probably welcome.
The newly bojoed are followed if they do not have spam in their miserable profile.
The real question is: Who shows up ahead of the NRs? They have only one thing in common: a comment. Some obviously suck and some do not.
Another question is how is the mojo list sorted just below the bojos. They don't have anything in common.