The certs that Certificate Manager manages are issued by AWS
We changed the title from "AWS is now issuing SSL certificates".
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.