To track view-through conversions, you need to use a tracking system that supports impression tracking. This usually means placing a pixel on your banner ads so that when someone sees the ad and later visits or buys from the affiliate site without clicking, the conversion can still be recorded. Many ad networks and affiliate platforms offer this option. It helps to check if your affiliate program allows view-through tracking and how long the conversion window is set. Some platforms allow only a short window, while others give more time. Using view-through tracking gives you a better idea of how your banners are working beyond just direct clicks. Have you tried setting it up this way?