Can anyone explain precisely how Amazon tracks referrals? Visiting an affiliate link to an Amazon product does not seem to set a cookie containing the affiliates id. Instead there is just a session-id cookie. So does that mean that the affiliates id is persisted server side in the session identified by that cookie? We have a strange network setup here and I am trying to make sure I have configured it correctly so that referrals from us are properly tracked. So is it sufficient to just ensure that the Amazon session-id cookie is set, or should the affiliates id be buried somewhere on the client machine?