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The one audience you actually shouldn't re-engage

What Calm learned from one lifecycle experiment that you can implement in your own program.

Luke Kline
/

Jan 7, 2026

An interview with Jeff Lee, Lifecycle Marketing Technical Lead at Calm

Recently, I was talking with Jeff Lee, the Lifecycle Marketing Tech Lead at Calm, about lifecycle experiments that look smart on paper but feel very different once you see the results. And he shared a really interesting learning with me from what might just be the single most important experiment he has ever run.

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