The subject-line mistakes that train apathy

The subject-line mistakes that train apathy
Framing line: clickbait subjects win one open and lose the next ten. Curated studies on the slow bleed:

📥 Swipe
— Promise-vs-payload audit — made the cut for the metric that matters: opens that don't lead to scroll-depth train Gmail you're low-value.
— The fake-RE: / fake-FWD: backlash data — picked because deception spikes complaints once readers feel tricked.

🧪 Tests
— Curiosity-gap fatigue study — worth it: the same trick decayed measurably over a 6-email run.

🚀 Deliverability
— Engagement-decay early-warning signs — included to catch the drop before placement follows.

Lesson: every open is a promise; break it and the next send pays.
Saved you ~75 minutes of short-term-win regret.