Google has never offered Gmail for free just out of the goodness of its heart. There are strings attached. One of those strings is that your e-mail can be scanned and used for activities like serving up advertising.
Google's terms of service haven't changed overnight, but awareness of them has, thanks to a Google filing that says e-mail users should really have no expectation of privacy.
This can be found within a motion to dismiss a class action data-mining lawsuit that objects to Google's e-mail scanning practices. Specifically, the motion quotes the 1979 Supreme Court case Smith … Read more