A 100–200 targeted visitor landing check (~30 leads at 15%) answers three questions at once: does the demand exist, does the message land, does the price hold. Strict A/B needs ~10,000 visitors per variant and 300+ conversions, and a reply rate needs ~1,500–2,000 sends per variant — run either at 80 sends and you get a confident answer to the wrong question, then re-run it next month on real money. 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/). Which hypothesis are you testing right now on a sample too small to separate signal from noise?