By a Performance Analytics Manager at a fintech affiliate network in Tallinn
For ten years, affiliate link tracking relied on browser cookies and sheer luck. Now, with Apple's ITP, Firefox ETP and Chrome's privacy sandbox rewriting the browser environment, that model effectively broke down.
In its place came server-to-server (S2S) setup: a unique click ID forwarded to the advertiser's checkout, then sent back through a postback URL the moment a conversion is registered. No cookie, no pixel dependency, no invisible commission leakage.
Mature affiliate tracking software is not anymore a link redirector with a admin panel attached on top.