Hazard windows are not “the next 30 days”
A rolling month is a filing habit. Detection needs the week a person usually disappears, and the week they do not.
Journal
Pieces written after class, while the argument was still warm.
Silence before cancel is a texture, not a count
Days-since-login flattens a night-shift nurse and a Saturday climber into the same risk. Cadence portraits refuse that flattening.
Accuracy is a flattering metric for rare cancels
When churn is uncommon, a model that never rings the bell still looks polished. We keep a different scoreboard in the room.
United Kingdom memberships keep different clocks
Direct debit, cooling-off, and the mid-month pause are not American card-on-file drama with a new accent.