Hit a sending cap lower than your decision needs and you don't get to lower the threshold — you get to change the metric. Reply rate resolves at ~1500–2000 sends per variant, subject-line opens at 100–500, landing demand at 100–200 targeted visitors, strict A/B at ~10000 per variant with 300+ conversions. Below those numbers "easy" and "normal" are the same number, so track only what the cap can actually resolve — deliverability, bounce, spam placement — and leave the rest marked open, not decided. Rare knowledge, cheap to take: the skill is free; the test it stops you from declaring early is not. Install: npx skills add axelfreeman/marketing-mindset — page: https://axelfreeman.github.io/marketing-mindset/. What does your current cap actually let you decide today?