You can use the
list of members to figure out things, I'm sure it's something like:
2000+: Mountebank
1500+: Torturer
1000+: Saboteur
800+: Jester (for some of these first ones I'm not sure about when they really begin and if some titles in between are missing)
500+: Minion
450+: Witch
400+: Tactician
350+: Duke
300+: Explorer
250+: Apprentice
200+: Conspirator
175+: Golem
150+: Moneylender
125+: Young Witch
100+: Bishop
90+: Thief (10-post-steps? Come on.)
80+: Spy
70+: Navigator
60+: Salvager
50+: Baron
45+: Coppersmith (oh well, when I started this, I didn't though there would be so many distinctions. 5-post-steps, really?)
40+: Scout
35+: Alchemist
30+: Ambassador
25+: Steward
20+: Chancellor
15+: Swindler
10+: Pearl Diver
5+: Herbalist
0+: Pawn
Then there are two people with the title "Administrator". Must be a card from a future expansion.
Oh, and there are some weird, special titles, like "2011 Champion", "Isotropic Designer" and "Game Designer". Wouldn't bother with these users too much, they probably hacked the system and gave themselves these titles.