Founded in 2018, 4K Miles, an Amazon Official Partner, is a SAAS platform that provides a one-stop solution for sales operation management for all Amazon sellers. In October 2019 they suffered a data breach that impacted 9.4 million Amazon shoppers. The attack led to the exposure of only Full names and Physical addresses due to the limited amount of data Amazon gives Sellers. There are also Email Addresses, however theye anonymized and all @marketplace.amazon emails (More info here).