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What Amazon’s 2026 Fee Changes Mean for Your Margins
Referral and fulfilment changes rarely land evenly across a catalogue. We model the effect by ASIN before deciding what to reprice, and the answer is usually narrower than it first looks.
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Why Contribution Margin Beats ACoS as a North Star
ACoS tells you what advertising cost. It does not tell you what the sale was worth. Optimising the first at the expense of the second is the most common way a growing account stops making money.
