Server-side attribution
The sale is matched on our server when Shopify fires the orders/create webhook, not in the shopper's browser, so it is accurate even with ad blockers or iOS tracking limits.
When a shopper checks out, Shopify fires an orders/create webhook to Harmonia, and we match the sale to the referring athlete on our own server. The match reads the ?ref= value the brand's store wrote into the cart note, so it does not depend on anything running in the shopper's browser. That means ad blockers and iOS tracking limits do not break the credit. Once the order is matched and the brand's monthly invoice clears, the athlete's commission is paid out.
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