Why? AWS is issuing certificates. They happen to be doing that through their new Certificate Manager service, but the more interesting news is that AWS is issuing publicly trusted certs.
It's a moot point now, because the announcement post (which we changed the URL to) has a different title. But the answer to your question is that we don't always have a magic title accuracy detector—though HN readers come close.
Thanks for updating it!
Better title would be "AWS is now issuing domain validated SSL certificates" since that's the actual news.