Is there a collection of the sort of unusual / unexpected things that companies do / can do. Not Google does X, but there is a market that sells X, and X can b

Is there a collection of the sort of unusual / unexpected things that companies do / can do. Not Google does X, but there is a market that sells X, and X can be linked to you personally by Y, Z So * A market exists for reselling credit card transaction data. Your card provider (ie Barclaycard) sells to companies such as $FOO who will aggregate same data from different providers and sells it for marketing purposes. The size of the market is $Billions * Google can link the purchase history to you personally by multiple means including - reading your gmail, and looking for purchase confirmations using last 4 digits * There is a market for reselling your mobile location and call history. your cell provider ... I would love to see this - I honestly need reminding of this and it seems like a great press expose.