> that, and they don't even have /.well-known/host-meta set up to properly redirect it.
I don't think www will cause problems, their webfinger works, request to https://threads.net/.well-known/webfinger?resource=acct:mosseri@threads.net returns {"subject":"acct:mosseri@threads.net","links":[{"href":"https://www.threads.net/ap/users/mosseri/","rel":"self","type":"application/activity+json"}]}