Back in the late 90s, there weren't a ton of free email services and most people used an account from their ISP. Extra accounts were hard to come by. If you had

Back in the late 90s, there weren't a ton of free email services and most people used an account from their ISP. Extra accounts were hard to come by. If you had a family sharing an internet connection, they might very well share an email address too. This let them have individual Amazon accounts.