From Masq

Experience points are awarded on a number of factors: Primarily players vote for each other using the +xp/vote system (type +help xp for details on how to use the system). You can also nominate fellow players for additional bonus XP using the +rec command (+help rec). Staff may also give out XP for good scenes and for building public projects or helping with code. Finally, a very small amount is given to each player based on the time spent active.