Affiliate products sometimes get discontinued, removed from programs, or go out of stock permanently. When this happens, content promoting those products becomes useless or needs major updates. Some affiliates check their links regularly to catch these changes early. Others only notice when readers complain or earnings drop. Finding replacement products and updating old content takes time, especially for sites with many articles. This maintenance work is often overlooked when starting out. How often should affiliates review their existing content for dead products?