Interesting, I had never made the relation between referer and advertising, which seems pretty obvious in retrospect.

This parts makes me a bit uneasy.

> The frustration here is that search, apps and HTTPS traffic all represent different types of readers arriving at The Guardian for different reasons — and not knowing that data hurts the Guardian's ability to serve those readers relevant content.

I am not sure I would be interested in a "tailored" news experienced. (Or "relevant content" is a weasel word for "relevant ads")