Amazon.com Inc. is under scrutiny from the European Union for potentially imposing unfair restrictions on firms selling on its platform.

Amazon.com Inc. reintroduced a clause in its user agreement that seeks to prevent shoppers from filing class-action lawsuits against the online retailer, inserting a legal buffer between itself and plaintiffs attorneys that it removed five years ago.

A New York City bill calls for the company to hire thousands of contract couriers. Amazon says the proposal will make delivery pricier and slower.

Middlemen lurking on message apps like WeChat offer access to company employees they say can grant favors for a price.