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Sounds a bit tin foil. View tracking fine, but the url parameters are so the onsite analytics knows where you came from, so that the people who run the site can make it better, from viewing aggregated reporting. They’re not looking at you individually. They would like to know if their emails are driving people to the site in order to view the file or whatever. Was the email good at the intended purpose? The parameters are likely added automatically to all emails from their CRM system.
I don’t think that many people would actually care, and I think more people know about it than you think.
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They’re not looking at you individually.
And yet the URLs are individual. I don't mind http://something.com/report df?source=email, I object to http://something.com/report.pdf?user=19475834927364
I think many more people would be upset by view and click tracking if they knew about it. I find it invasive. If I couldn't sleep last night so spent some time reading emails I don't want to share that with the people that sent the email.