Some of them are self-explanatory like MOD, Transfer Point or Daily Visitor, though does that mean if you don't visit every day, or transfer points regularly your ranking will drop off? Others like People's Person may as well be magic.... or cheese.
I like them, but they make for a lot more scrolling. Maybe it would be better to only show them on the profile pages or display more compact. 2 Short comments fills up the entire screen.