Open the segment builder in almost any Klaviyo account and you will find the same definition: last placed order more than 90 days ago. The label says “Lapsed.” The flow attached to it says “Winback.” The assumption underneath, the one nobody wrote down, is that time since last purchase tells you whether a customer is done with you.
It does not. A store that sells one-off orders gets no cancellation, only silence, and for a long time “has not ordered yet” and “will never order again” look identical. So the industry reached for the one thing it could measure: a stopwatch.
One cutoff assumes one rhythm
Take two shoppers, both quiet for 90 days.
The first bought every month for a year, then stopped. Against a monthly rhythm, 90 days is three missed cycles: very likely gone, and flagged two months late. The second buys twice a year, like clockwork. Against that rhythm, 90 days of silence means nothing, and the winback flow has just offered them 20% off an order they were going to place at full price.
Same recency, opposite realities, one cutoff wrong for both. The question was never how long it has been. It is how long it has been relative to how this customer behaves.
Chance is not value
Churn cannot be observed, but it can be estimated one customer at a time: the chance still active, read from each customer’s own rhythm against how long they have been silent. A frequent buyer gone quiet is probably done. An infrequent buyer with the same gap is probably fine.
Chance says who is alive, not who is worth the effort. For that, read it beside Forward CLV. Alive but low in value, and valuable but fading, are different problems, and you need both numbers to tell them apart.
Revive, retarget or sunset
With both numbers on every customer, the quiet middle stops being one “lapsed” blob and becomes a routing decision.
LowerForward CLVHigher
Retarget
Valuable and fading. If email no longer reaches them, try another channel.
Revive
Likely active and worth the effort. Build the message from their history.
Sunset
Probably gone and low in value. One short sequence, then suppress.
Low-touch
Active but low in value. Keep them in regular flows and do not overspend.
LowerChance still activeHigher
Revive the customers likely still active and worth real money, with an effort built from their own history and timed to their rhythm. Retarget the valuable customers email no longer reaches, in channels you can aim yourself. Sunset the customers probably gone and low in value: one short sequence with a hard end date, then suppress. A winback with no end date is not a flow, and every extra message spends domain reputation shared with everything else you send.
Monday morning
- Sort your lapsed segment by lifetime value and read the top fifty. Six-order customers are sitting beside one-and-done discount hunters, about to get the same email.
- Give every winback flow an end date. Then suppress.
- Decide the three paths before the next send, so the valuable and the gone stop sharing one flow.
Tacet scores every customer on chance still active and Forward CLV, every night, and runs the win-back playbook on the ones worth it. Get the free P&L.