I'm working on an (open-source) alternative to Google Analytics [0] and it's true, you cannot track users with perfect precision. It's technically not possible to archive, but you can fix some of the issues, like tracking on the backend to get around ad blockers or by setting up a CNAME record and serve the script from your own domain.
Anyway, even if tracking (or analytics, which is not the same!) isn't perfect, it's at least an indicator of how well you're doing. Which is better than having no data at all. Paying for ads that were "clicked" by bots or simply don't reach the target audience is a whole different story and the author is right, you will probably waste money.
Anyway, even if tracking (or analytics, which is not the same!) isn't perfect, it's at least an indicator of how well you're doing. Which is better than having no data at all. Paying for ads that were "clicked" by bots or simply don't reach the target audience is a whole different story and the author is right, you will probably waste money.
[0] https://pirsch.io/