I also find it kind of funny that the "blunder" mentioned in the title, according to the article is ... installing Huntress's agent. Do they look at every customer's google searches to see if they're suspicious too?
As far as unique identifiers go, advertisers use a unique fingerprint of your browser to target you individually. Cookies, JavaScript, screen size, etc, are all used.
I'm also slightly curious as to if you might be associated with an EDR vendor? I notice that you only have three comments ever, and they all seem to be defending how EDR software and Huntress works without engaging with this specific instance.
Cybersecurity companies aren't passive data collectors like, say, Dropbox. They actively hunt for attacks in the data. To be clear, this goes way beyond MDR or EDR. The email security companies are hunting in your email, the network security companies are hunting in your network logs, so on. When they find things, they pick up the phone, and sometimes save you from wiring a million dollars to a bad guy or whatever.
The customer likes this very much, even if individual employees don't.