You don’t need to.
By using metrics like IP address , age, gender, race, religion, city, workplace, application, website, favourite song, colour and flavour, throw in a few more questions and you can lucratively target specific groups of people.
By COMBINING those metrics you can target extremely small groups of people, groups with precisely ONE member.
No need for a unique GUID at all.
If that’s what installing Linux is like I don’t want to know what installing Windows looks like.
Also, in unrelated news, I’m now available for Linux installs…