> It's designed to help manage multiple accounts without getting flagged, which seems quite useful for my Amazon accounts ... The tool's premise seems to be th

> It's designed to help manage multiple accounts without getting flagged, which seems quite useful for my Amazon accounts ... The tool's premise seems to be that having multiple accounts on any given service is universally considered to be poor form and they help you sidestep that perceived limitation by helping hide the fact that you run multiple accounts. Amazon's main user menu has a "switch accounts" link, i.e. they very explicitly support running multiple accounts from the same browser session.