However, there are other users here who also were unregistered users before the migration, such as SimchasTorah, who while were unregistered, kept their "user page".
On the other hand, people who were deleted (at least now), got their name removed and replaced with a number (such as this.
What is going on?
I AM NOT ASKING TO KNOW WHAT HAPPENED TO ANY PARTICULAR USER. I JUST WANT TO KNOW ABOUT THE CLASS