https://tech.newstatesman.com/security/amazon-alexa-human-assistants

Alexa is listening for your commands, and so, reportedly are Amazon staff and contractors, who are amassing speech data to improve the smart speaker’s responsiveness. These revelations about Alexa’s human assistants have, unsurprisingly, raised privacy concerns.

Alexa apparently needs a little help from human sources to better decipher user requests. Amazon acknowledged that individual staff and contractors in a number of countries including Romania, India, Costa Rica, and the US each evaluate as many as 1,000 recorded requests to Alexa during their nine-hour shift.