However, based on the mathematical inferences above, the total number of accounts stolen only represents about 3.5 percent of the over 400 million registered Hotmail accounts. According to ...
If you are being asked to enter a password multiple times for your Microsoft account, Credentials, Browser Cookies, Sync issues, 2FA, third-party conflicts could be the cause.
Every email sent from a Hotmail account included a signature at the bottom that read, “Get your free email at Hotmail,” with a link to sign up. This tactic was cost-effective and viral by nature.