Amazon Data Update: What Merchants Should Know About Recent API Changes
Amazon recently removed a key customer identifier from its API, which impacts how analytics platforms track repeat customers across orders. As a result, certain metrics in Peel including repeat customer rate, LTV, and cohort analysis, may appear inconsistent for Amazon data. This post explains what changed, what metrics are affected, and how the Peel team is responding.
Jordan Berg

April 2, 2026
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