If you have AT&T’s gigabit Internet service and wonder why it seems so affordable, here’s the reason—AT&T is boosting profits by rerouting all your Web browsing to an in-house traffic scanning platform, analyzing your Internet habits, then using the results to deliver personalized ads to the websites you visit, e-mail to your inbox, and junk mail to your front door.

via AT&T’s plan to watch your Web browsing—and what you can do about it | Ars Technica.