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It is one of dozens of things used to establish a unique fingerprint. Check this out, I bet you can be individually identified and tracked with nothing more than what your browser reveals, including the UA.
Reddit uses exactly this to enforce site bans so they can identify people that just change emails or even public ip addresses. It’s almost certainly used to create phantom profiles at hundreds of sites whether you make an account or not.
https://smartframe.io/blog/browser-fingerprinting-everything-you-need-to-know/
Seriously. My cats are so relaxed because they get their food at the exact same times every day. I still hand feed the first and last meals (canned wet food), but it gives them something to look forward to during the day, even when we are at work.
They can also apparently tell time now because they get ready within five minutes of most feedings, I like to think that makes them feel more connected to their world and existence.