Behaviour beats vanity metrics, every quarter, every time

Open rate tells you whether your subject line worked and your sender reputation is intact. Both matter. Neither pays the bill.

If you want to know whether your CRM program is healthy, look at three things: repeat purchase rate, time-to-second-purchase, and the share of revenue coming from lifecycle flows vs campaigns. Those three numbers will tell you more about the business than a quarterly inbox screenshot ever will.

The trap is reporting the metric that's easiest to move instead of the metric that matters. Subject-line tests are addictive precisely because they produce visible deltas. Cohort behaviour shifts slowly, and shifts the P&L.

Re-anchor the dashboard around behaviour, and the conversation about CRM stops being a content review and starts being a commercial review. That's the conversation founders care about.