[Bish0pQ]

A lot of people lost access to their accounts because they were using the same passwords.

Exactly this.

The majority of online users are not security-minded, therefore It's human nature to use the same credentials for multiple accounts. It's much the same as adding numbers at the "end" of a password, and not at the start or In the middle. I've witnessed this a thousand times over.

I totally agree, I'm writing a tool soon that will help you check where you have registered an account and it where you might have used the same password to help users remembering there accounts so they can change their credentials if needed.