@evan
One that I use, several old ones still connected to accounts on other services that I either can't or don't have any plans to move over.
For example, I have a paid Battle.net account that I can't access because that email address was shut down, and while waiting for Blizzard support to change it to my current email, I created a free account using an email connected to a Microsoft-account I haven't used for years. And now I can't close that account because Blizzard support never fixed my paid account, so I'm still using the temporary one.