Ask HN: Does Google look at !g queries to help improve search results?
As in, accidental !g's typed by DDG users thinking they're on DDG.
<meta name='referrer' content='never'>
Interestingly, it doesn't to other networks. For example, Wikipedia, Reddit, and Twitter redirects use this: <meta name='referrer' content='origin'>
So they can tell it's from DDG, but not the exact URL (not that it matters because they get the query anyways)