2010 February 25, “Clicking for Gold”, in The Economist[1], →ISSN:
Google exploits information that is a byproduct of user interactions, or data exhaust, which is automatically recycled to improve the service or create an entirely new product.
2013, Viktor Mayer-Schönberger, Kenneth Cukier, Big Data: A Revolution that Will Transform how We Live, Work, and Think, Houghton Mifflin Harcourt, →ISBN, page 114:
Data exhaust is the mechanism behind many services like voice recognition, spam filters, language translation, and much more.
2022, Duncan R. Shaw, Managing Emerging Data Technologies: Concepts and Use, SAGE, →ISBN, page 95:
Super apps use the data exhaust to understand which other products and services a customer might need and give them the high frequency relationship to offer them. An example of this for taxi apps is when the app suggests useful information about shops and restaurants at a drop-off location.
data exhaust on Wikipedia.Wikipedia 