At ~1,500–2,000 sends per variant a reply rate is a number; at 20 it's a mood. Delivery and copy mechanics resolve at 50–100 sends, subject lines and opens at 100–500 per variant, and a strict A/B wants ~10,000 visitors per variant and 300+ conversions before it says anything at all. Kill an offer on 60 sends and you've burned a month and the list to learn nothing — that wasted test costs more than the campaign you were trying to save. Rare knowledge, cheap to take: the skill is free, the test it stops you from wasting is not. Install: npx skills add axelfreeman/marketing-mindset — page: https://axelfreeman.github.io/marketing-mindset/. How many sends did your last "dead" offer actually get before you buried it?