s advertising products. How a unit moves through the network The process starts in Seller Central, Amazon s announcement. Joe Walowski, the product manager at launch, said Amazon built it Amazon attaches its own delivery promise to the listing, making the product eligible for the Prime badge shown to paying members. Third-party sellers accounted for 60% of paid units sold on Amazon in the first quarter of 2026 , according to Marketplace Pulse, the first back-to-back quarterly decline since Amazon began reporting the figure in 2004. How a unit moves through the network The process starts in Seller Central, Amazon's seller interface.