This is a share of all orders made by users led by publishers, for which the publishers got actually paid. For instance, a publisher led 100 users that made an order. From those, 30 people returned the product. Thus, the publisher got rewarded for 70 customers, while the approval rate came to 70%. The approval rate may differ from segment to segment. For instance, it may be higher in the Footwear & Apparel category but lower in Loans. The reason is simple: not every loan applicant gets their applications approved, while no approval is needed when a user buys clothes.