<b>I tested with $50 and "proved" a winning offer was a loser</b>

<b>I tested with $50 and "proved" a winning offer was a loser</b>

Under-funding the test is the most expensive way to save money I know.

<i>The setup</i>
— New CPL offer, $13 payout, push traffic.
— I gave it a "safe" $50 test budget to see if it had legs.

<i>The move</i>
Killed it at $50 spend, 0 conversions, ROI -100%. Filed it under "dead offer."

<i>The numbers (illustrative)</i>
— At a realistic ~1.5% conversion rate and $0.30 CPC, $50 buys ~167 clicks: expected conversions, about 2.5.
— Getting zero on that sample is pure variance, not signal. The math says I needed ~$150-200 just to see a believable rate.
— A peer ran the same offer to $300 and hit 41% ROI.

<i>The lesson</i>
A test budget below a few times the payout tells you nothing but noise. Killing offers on under-powered samples means you'll reject winners at random and never know it. Cheap tests are the most expensive habit in arbitrage.

<i>What I'd do differently</i>
Size the test so you'd expect at least 5-10 conversions if the true rate is decent, roughly 5-10x the payout minimum. If I can't afford a real test, I can't afford the offer yet.