This should shock no one and if anything the shocking thing is transparency (though that is likely a ploy as I guarantee based on these articles plenty of people will go view it to correct the record, giving Amazon a great source of refinement for ad tracking)

Literally every major website (and basically every website that run JavaScript for that matter) tracks and profiles you. Your tv does the same, as does your phone and almost all the apps on it, etc. and the profiling they don’t show you definitely exists: race, political affiliation/leaning, income estimates, address, educational level, health issues, etc