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Re:How many users block Google analytics? (2017) by dsr_ on Sunday March 01, 2020 @08:20AM (#22456735)
Serial numbers filed off: an author announced on his newsletter that he was going to turn on the "feature" of his mail service that would automatically unsubscribe anyone who didn't read the newsletter.

It tracked this, of course, by assuming that the mail would be opened in a web browser that would make requests for images.

He cancelled that decision:

"Logged opens for each newsletter are between 53% and 60% -- but an experiment a while back revealed that hundreds of you aren't logged, for various reasons around email security and that one guy who reads everything on a 1980's greenscreen monitor. Clicking of links depends massively on what's in the newsletter, plus the note in the previous sentence, but has gone as high as 41% of readers on one week this year."

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