Your account
Signing in keeps a record of every thought you send while you are signed in, and of what became of each one: the committee, the reveal, and whether it graduated. Sending a thought never needs an account.
Your history is a permanent record of your presence: once a thought is sent, it becomes part of the archive that cannot be unmade.
The engine keeps a pseudonym for you and nothing else: no name, no email, no picture. Who you are stays with the sign-in provider.