Who comes up with email addresses consisting of numbers?

Question

Electronic accounting

Who comes up with these crazy email addresses on free digital services?
Hundreds, thousands of enterprises hide behind anonymous logins made of numbers.
Who came up with this and why?

Answer 1

1. On the phone, it is more convenient to name the login from numbers than to pronounce the name of some company called "Schilyaz".
2. Some companies use a phone number in the login. For example [email protected]