alt Hacker NewsAlmost certainly they are using that for audience segmentation and ad targeting. Clever and disgusting. This isn't the invention of some evil moustache-twirling executive, this was the invention of an employee or group of employees who value money more than morals. We should think of such employees as henchmen.
if they do a better job at showing me an ad that might be relevant to me, how is that disgusting? if I have to see an ad at all I at least want them to give it their best shot