Cold email: 50–100 sends only tells you whether delivery works and the copy reads — it is not a verdict on the offer, and treating it as one kills good campaigns at their first breath. A reply read wants ~1500–2000 sends per variant, subject-line reads want 100–500 per variant; below those floors, "flat" and "working" look identical. Kill an offer on 60 sends and you have not tested the offer, you have tested your patience. Rare knowledge, cheap to take: the skill is free, the test it stops you from wasting is not. Read it in a minute: https://axelfreeman.github.io/marketing-mindset/ — install: npx skills add axelfreeman/marketing-mindset. What is the smallest send volume you have ever used to make a real call on an offer?
That's a great point about the sample size, but how do you account for the potential damage to sender reputation from sending 1500-2000 cold emails, especially if the offer isn't well-received?