How would you feel if a private company would give away free surveillance cameras to the store operators in return for telling them how many people walked through their doors? Or how would you like your real-estate agent CC'ing all your house purchase documents to a fax service hosted in another country just because it got to fax you for free? This is the state of ignorance that I am talking about. It all starts rather innocently with using gDrive to store some photos, but then bit by bit it weasels its way in and establishes new "privacy norms", where apparently privacy is a new currency - jeez, are you serious? Really? You would let someone observe you taking a shit in return for a free roll of tissue paper? This is wrong. The fact it's an established practice doesn't make it any more right, leave alone ethical. Sober up.