So what exactly do they do with this "data" to make them money? Just advertising? It's not like they are taking my credit card numbers and online bank account numbers to steal money from me. If they have a bit of info on me to give me free services like Google Voice and Gmail, I guess I don't really mind (mostly because I just have no clue what info they get and what exactly they do with it). Is it possible that the "data" that they collect can do harm to us in anyway?