Questions, ideas, a bug, or a sorting story? Tobias reads every message.
Most things you can do yourself on your account page: download a copy of your data, or delete your account. If you cannot log in any more, send a message with the email you used and Tobias will help. More in Help & FAQ and Privacy.
Put your email in the box at the bottom of any page and press Join. You get a note when something new opens, and nothing else.