What Stockout Hours Do to Affiliate Campaign Results

A bestseller sells out at noon, but its affiliate placement runs until evening. By the next morning the daily conversion rate has fallen. Before changing bids, find out what the afternoon clicks could actually buy.

Rebuild the availability window

Ask the advertiser for the stock-change time for the promoted variant and market. Align that timestamp with the click report's time zone. Check the landing path: some pages disable checkout, others switch to a different size, and some accept backorders. A page that still loads does not establish that the advertised item was purchasable.

Keep the cost in the campaign result

In a hypothetical placement, 200 clicks arrived before the stockout and 100 after it. If six approved purchases came from the first group and none from the second, the campaign delivered six purchases from 300 clicks, or 2%. The available window alone delivered 3%. Use the first figure to account for the spend and the second to investigate performance while the offer could be bought. Neither proves what the later visitors would have done with stock available.

For media buyers, a practical restart condition is confirmation that the exact variant can be ordered in the target market. Let delayed orders settle and group them by originating click before judging the creative. If stock history is missing, label the interval uncertain rather than guessing where to split the data.