PalaestralLeave the list.
Taking your address off deletes the answers you gave with it, and nothing more is sent about signups.
Take it off
The link in the email brought you here. Press the button and the address and its answers are deleted from the list at once: opening this page changes nothing until you do. When signups open, the address is copied over to be told so, and that copy is deleted the next time the list is read, which is always before that email goes.
Without JavaScript, reply to the email or write to hello@palaestral.com, and it is done for you.
What the list keeps
The list keeps the address and the answers given with it for 180 days from when they were given, and then deletes them. They are used to email you once when instructor signups open, and to set up a call if you asked for one, and they are shared with nobody. An address nobody confirms is sent nothing more. Privacy has the rest.