Every message waits for a human admin. An automatic check first rejects obvious problems (links, contact details, insults, flooding); it is a coarse filter and cannot judge everything, so passing it does not mean approval. Approved messages appear as “Selected messages of support”; not every message is shown.
We store your nickname, your message, your optional avatar (a small image), a hash of a random credential kept in a cookie on this device (to recognise your own record), and, for a short time, a salted hash of your IP address for rate limiting. No login, email, or real name. You can withdraw your message from this device at any time and it leaves the wall at once; the avatar is deleted.
A message is not a signature on the open letter and is not delivered to NVIDIA automatically.