Today Foursquare announced it is partnering with Visa and Mastercard to expand its credit credit specials program. Now, just like AmEx members, Mastercard and Visa cardholders can sync their accounts with Foursquare to earn discounts at nearby restaurants and retail stores.

Chirpify lets consumers purchase goods on Twitter and Instagram simply by typing "buy." Now, it's offering free-for-life service to indie artists.

As mobile payments players race to innovate credit cards, PayPal spots an opportunity in the 1 of every 12 American households without bank accounts.

My Offers taps what AmEx calls the "spend graph" to give cardmembers access to deals and discounts at nearby merchants. And it knows your mom couldn't care less about getting 50% off tickets to a three-day electro-fest.

“We realize that when it comes to payments, no single wallet will rule them all," says Ed McLaughlin, chief emerging payments officer at MasterCard, which today launched its PayPass Wallet Services.