What to do instead, and it is much higher return at forty signups a month: talk to the people.
At your volume you can contact every single signup. Not a survey - a short direct message asking what they were trying to do and what nearly stopped them. Seven or eight real conversations will tell you more about your landing page than any test you can run this year, because they tell you why, which no amount of conversion data ever does.
What to ask, roughly:
- What were you trying to solve when you found this
- What did you expect it to do
- Was there a moment where you nearly did not sign up
- What did you use before
The answers cluster fast. If four of seven say they could not tell what it did, that is a finding with a clear action, and it is far more actionable than a sixty percent lift you cannot reproduce.
Also watch a few people use it, if they will let you. Five sessions of watching someone attempt your onboarding uncovers things no metric surfaces, because a person getting stuck for ninety seconds and then succeeding looks identical in your funnel to a person who sailed through.
This is unscalable and that is fine: it is the right tool at forty a month, exactly as hand-written emails are the right acquisition channel at that size.