I used it (and Microscopes beginning of game stuff) as inspiration for my XP system for my system.
There is a list of about 25 "triggers", ranging from "Someone brought food for the group to share", to "A character or NPC died during the session." to "The party was split for >1/3 of the playtime.".
At the start of the game the group together decides on 7 of these as "positive triggers", which if they occur the group gains an XP.