Small businesses and major brands alike rely on Amazon but are increasingly ambivalent about selling on the platform. The Amazon Marketplace is a battle royale of millions of sellers and declining profit margins. Meanwhile, Amazon is building its own branded line of competing products, called AmazonBasics. That, and other practices, make Amazon their frenemy -- a major competitor as well as their most important partner. From a societal standpoint, is this a good thing?Learn more about your ad choices. Visit podcastchoices.com/adchoices