> How could it be good for a corporation to hire psychologists to manipulate customers into spending more time on their product? The effort was precisely to of

> How could it be good for a corporation to hire psychologists to manipulate customers into spending more time on their product? The effort was precisely to offer a different objective than time spent on the site, that is a reasonable first approximation for usability and relevance, but not a good self-referential objective. There is evidence that mirroring content has a positive psychological impact.