This is about a month old and has probably already been mentioned here someplace but I couldn’t find it.
According the article linked to in the quote, this does not apply to ads that are clicked on though.
Interesting. Thank you.
Sure, cheers. I figured it might be of particular interest to people who find that they need to search forums on a regular basis - especially if what they’re searching for might tend to give an indication of their identity. 
edit: of course that’s not the only reason. It’s privacy concerns in general, but that was the example I had in mind.