Every federal agency that has anything to do with consumer products sends Amazon warning letters all the time regarding specific sellers and individuals, includ

Every federal agency that has anything to do with consumer products sends Amazon warning letters all the time regarding specific sellers and individuals, including the FTC, telling AMZ to knuckle down on the seller and/or the brand, or vaguely telling Amazon "do something" which Amazon may misinterpret. Then there are the more significant inquiries that are also going on apart from those 'market, regulate thyself' actions.