2 Amazon Margin Lab

Protect Your Margins Before You Buy More Traffic. Fix listing economics, diagnose real profit leaks, and decide whether to raise price, chan...
Warrington, GB
Created byProfile pictureJAMARO
1 joined
Profile picture
JAMAROProfile picture@javier-mariajo·May 15

Just published my 17th ebook and added my 4th VSL.

This journey has definitely had ups and downs.

Some days feel productive and exciting.

Other days feel messy, slow, and full of self-doubt.

But one thing is becoming very clear to me:

A lot of people are secretly waiting for certainty before they launch.

Bad strategy.

The market rewards speed of iteration, not perfection.

Launch.

Observe.

Adjust.

Repeat.

That cycle alone already puts you ahead of most people who stay stuck planning forever.

Some of my products improved only AFTER publishing them.

Some skills only started developing once I actually did the work publicly instead of overthinking privately.

Perfection delays growth.

Execution accelerates it.

Keep building, Monetise family.

We learn faster in motion than in hesitation.

Profile picture
JAMAROProfile picture@javier-mariajo·May 3

The Math Most Amazon Sellers Skip Before Scaling Ads

Most Amazon sellers hit a wall that looks like a traffic problem but is actually a unit economics problem.


Here's what I mean:


You're running PPC at a 25% ACoS. Sales are growing. But net profit is flat — or shrinking. You add more budget. Same result. So you try coupons, Subscribe & Save, or Lightning Deals to juice conversion. Margin gets worse.


The issue isn't traffic. The issue is that your fee stack, landed cost, and promo spend are eating contribution margin faster than volume can replace it.


A quick test anyone can do right now:


Take your best-selling ASIN. Pull the last 30 days from your Business Reports. Now calculate:


  • Sell price (net of any coupons or Subscribe & Save discounts)

  • Landed cost (product + freight + prep + duties)

  • Amazon fees (referral + FBA fulfillment + storage)

  • Ad spend allocated to that ASIN


Subtract everything from revenue. That's your real contribution margin per unit.


If it's below 15%, you have an economics problem — not a traffic problem. Scaling ads on a listing with broken unit economics just scales the loss.


Before you increase budget, ask three questions:


  1. Can I raise price without killing conversion?

  2. Can I change pack size to shift the fee-to-revenue ratio?

  3. Should I cut the promo that's compressing margin?


These aren't creative questions. They're math. And the math should come before the media buy.


I built a full system for running this audit — the 5-Step Profit Filter — and packaged it with the worksheets, decision matrices, and break-even tables I use on my own catalog. It's available here if you want the complete framework.