iComp sends this quote from El Reg: "PayPal, Google Wallet and other online payment systems face higher transaction fees from MasterCard in retaliation for their refusal to share data on what people are spending. Visa is likely to follow suit. The amount that PayPal has to pay MasterCard for every transaction will go up as the latter introduces new charges for intermediated payment processors. This change is on the grounds that such processors don't share transaction details, which the card giants would love to get hold of as it can be used to research buying patterns and the like. Companies such as PayPal allow payments between users, so the party (perhaps a merchant) receiving the money doesn't need to be registered with the credit-card company. PayPal collects the dosh from the payer's card, and deducts a processing fee before passing the cash on to the receiving party. MasterCard would prefer the receiver to be registered directly so will apply the new fee from June to any payment that is staged in this way."