Trying to visit the page of a user that doesn't seem to exist anymore: https://listenbrainz.org/user/NcOaujs/
However I can query the API and get a response: https://api.listenbrainz.org/1/user/NcOaujs/listens

Same goes for random string of characters as user name, I get a 200 response back instead of the 404 I'd expect.
The same goes for the listen-count endpoint and I would assume others too.

{
"payload": {
"count": 0,
"latest_listen_ts": 0,
"listens": [],
"user_id": "kljhgfchjklnbvghjknbvghjk"
}
}