https://www.theverge.com/2022/4/28/23047026/amazon-alexa-voice-data-targeted-ads-research-report
A report released last week contends that Amazon uses voice data from its Echo devices to serve targeted ads on its own platforms and the web. The report, produced by researchers affiliated with the University of Washington, UC Davis, UC Irvine, and Northeastern University, said the ways Amazon does this is inconsistent with its privacy policies.