On impact.com's Net 45 January template, an order placed on 31 January locks at the end of February. The page presents that sequence as a template example. Count a 30-day returns window from 31 January and it ends on 2 March in a non-leap year, or on 1 March in a leap year, after the lock.
Judge a platform on one paid order: who can take a commission, and whether the row matches the shop. Awin's de-duplication page, listed as published on 9 March 2026, automatically credits one Awin partner only when you are not running partner activity on another affiliate network. impact.com requires im_ref in a first-party cookie or on the server, and the cookie's lifetime must match the referral window in the contracts. A successful call is queued for processing.
There is no single agentic checkout to tag. In-chat completion has no merchant page for gtag to fire. A Shopify ChatGPT path still hits your store checkout in an in-app browser. The GA4 job follows that split, and any source you write is a merchant convention.
Visible AI referral traffic still sits around 0.2% of sessions on the broadest public benchmark, and the undercount is wider than the channel. Here is a proportionate tracking ladder for D2C operators.
Before MER goes in the board pack, marketing and finance need a written inclusion list for the denominator. The ratio is only comparable if that spend policy is fixed, restated when it changes, and read next to contribution profit.