It was well known for us early gmail users that they would scan mails (on-the-fly iirc) to provide relevant ads. They were fairly up front with it (remember, b

It was well known for us early gmail users that they would scan mails (on-the-fly iirc) to provide relevant ads. They were fairly up front with it (remember, back in the days Google was a nice trustworthy company or at least that was my impression.)