Idea for fame and infamy setting rules for a new campaign.
Every XP the players mark during the End of Session move will count toward, or against, factions involved in the session.
Those relationship will level up the same way characters do, i.e. 7+level XP for the next level, in either fame or infamy for that faction.
Each level beyond the first, the group/setting gets a costume move related to that faction and the party’s relationship with it. Fame will usually let the party call it some favors, while infamy gets invoked at unfavorable times.
Alternatively, the party may only get the faction moves if they create a bond with it, which plays and resolves as normal.