Before you kill a cold email or declare a winner, check the threshold: 50–100 sends only tells you delivery and copy mechanics — it says nothing about whether the offer works. Replies need ~1500–2000 sends per variant. Subject lines need 100–500. A landing page needs 100–200 targeted visitors. Below those numbers, "it works" and "it doesn't" are indistinguishable, and you will confidently make the wrong call. Rare knowledge, cheap to take: 15 years of B2B practice compressed into one file your agent can read in a minute. 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/). What's your current threshold before you call a test — and did you pick it, or just inherit it?