I had same issue. Tried to donate an unused 4-character ID to someone else. System can't accept 4-char name being available.
— Simon Dickson (@simond) November 1, 2016
I had same issue. Tried to donate an unused 4-character ID to someone else. System can't accept 4-char name being available.
— Simon Dickson (@simond) November 1, 2016