Has this account been deleted?

The linked user account exists (https://www.drupal.org/user/85918). The user posted his last comment on August, 2019.

When an account is deleted, the username is replaced from Anonymous user and no link to the user profile is available. If you see a link to the user profile, that account has not been deleted.

For what I can see, the account has been blocked, and that explains why you don't have access to the user profile. (Only user administrators can access the profiles of blocked accounts.)

I cannot say why the account was blocked, since the user has never spammed, and I cannot find any post about blocking the user.

Account https://www.drupal.org/u/hass is longer blocked. No idea what happened.

Blocked accounts return status code 403 (Forbidden) to most people. They can be unblocked.

Deleted accounts return status code 404 (Not found) to everyone. They can only be restored from backup.

I unblocked hass, as I didn't find any reason to block him.

This user was blocked in connection with a Community Working Group matter; we have reblocked the user and are working on ways to make it more clear to user admins when and why users are being blocked.

@gdmet I apologize: I didn't find any track of actions taken on the account.

As user administrator, I can see and edit a field for the user accounts (Notes with the description Admin-only notes). Maybe that field should be made visible from webmasters (and users with other, higher, roles) when they look at a user account, without the need to click on Edit to edit the account.

@kiamlaluno - No worries. Moving forward, any CWG-initiated blocks will only be done by users with user admin privileges and we'll make sure to leave a note.

@Joachim Namyslo - As per our standard policy, we maintain confidentiality for those involved in matters that come before the CWG. It has not to date been our policy to notify project co-maintainers when actions are taken, though we're open to discussion about that in our issue tracker. I've responded to your email with some additional context, though you would need to talk directly with the user in question for more details.