Attribution is layered, no single method catches every sale. Give each creator a unique discount code and a UTM-tagged link for the direct, trackable sales. Then add a post-purchase how-did-you-hear-about-us survey, because people often discover you through a creator then search and buy later, which codes and links miss. Compare results against a normal baseline period and never judge a creator on last-click alone or you will kill the ones driving real awareness.
Attribution is layered
No single method catches every sale. Stack a few and triangulate.
Codes and links first
Give each creator a unique code and a UTM link for direct, trackable sales.
Add a survey
A post-purchase how-did-you-hear question catches the sales codes miss.
Judge against a baseline
Compare to a normal period, not last-click, to see the real lift.