The data presents the third-party seller share of the Amazon platform as of the second quarter of 2018, based on paid units. As of the last reported quarter, 53% of paid units were sold by third-party sellers. In 2017, Amazon generated 31.88 billion USD in third-party seller service revenues, up from 22.99 billion USD in the previous year. Seller-service revenues account for the second-biggest revenue segment of the online retail platform, after retail product sales and ahead of Amazon Web Service revenues.
