
... MasterCard recently announced plans to raise prices on intermediated payment processors (read: digital wallets) that chose to withhold valuable transaction details from MasterCard. In other words, this measure takes direct aim at eBay's (NASDAQ: EBAY ) PayPal and other digital wallets such as Google Wallet that do not share transaction details with the payment processor.
Priceless data
The more transactional data a company can get its hands on, the more insight it has on consumer behavior. In an age where marketers are working to better connect the advertising world with the world of commerce, transactional data becomes the equivalent of marketing gold. ...
http://www.fool.com/investing/general/2013/04/09/paypals-biggest-nightmare-is-coming-true.aspx
It's also gold to governments for controlling the population in a cashless society.