Pressure from the EU over the issue of humans reviewing recordings from their respective digital assistants. While Apple and Google paused human review, Amazon has decided to offer a clearer, more comprehensive opt-out setting to Alexa users.
Amazon already offered a much clearer set of privacy policies than either Google or Apple having set up a privacy portal after the last round of scandals over Alexa voice recordings revealed more than most realized.
You can go to your Amazon Alexa app and navigate to your settings, then “Alexa Privacy” and finally “Manage How Your Data Improves Alexa,” and find new language on that page that now specifically calls out that “your voice recordings may be used to develop new features and manually reviewed to help improve our services”