Journal

Notes from recent closes

Short essays written after classroom arguments, not before. They assume you already care about whether a number can survive a controller.

Recognition · 12 min

Recognising false growth in reported MRR

Prepaid annuals, courtesy credits, and mid-cycle upgrades that inflate a tile the ledger never agreed to.

Cohorts · 9 min

Retention looks decisive until you ask who was allowed into month zero, and who was quietly removed.

Churn · 11 min

Collection failure, seat shrinkage, and unadopted price points wearing a churn costume.

LTV · 10 min

How a six-week price test contaminates lifetime value if you let the experiment share a cohort with the list price.