Spying on your users does not give better feedback than simply asking your users (surveys, focus groups) and responding to the considered comments you receive. Spying and trying to infer intent is such a low bar to improve upon.
If that's true, there are many companies paying thousands -hundreds of thousands unnecessarily. Why are they choosing to throw away their money?
This is a fundamental property derived from information theory, but also confirmed time after time in practice: https://www.theguardian.com/technology/2019/jul/23/anonymise...
Data anonymization is a myth sold to politicians to whitewash data collection.
But in any sufficiently complex real-world database, it is a trivial step to map these pseudonymous tags to actual users, and thereby undo the obfuscation. It provides no actual privacy protection.
And the privacy IS the issue here.