Im kinda wondering how relevant all this is when mobile phone apps ,which people agree to, is the primary means of collecting our data.
the concept of data aggregation though as mentioned brings a whole new meaning to targeted marketing . The likes of Sky television have been quietly harvesting customers data for years , now you can even authorise it to use the mic ,for voice commands ,but also to market to you more effectively , its like gold mining , no wonder they even give you a free TV when you sign up .