David Heun

When Amazon was busy driving traffic to its site — and the likes of Walmart and Best Buy were aggressively trying to pull shoppers away — it also invited several issuers to compete to be the top-of-wallet card for Prime Day spending.

During his time with the company, Hogg directed its transformation from Interbank to Mastercard and helped expand the card brand's global presence.

Even with an economy that has slowed to a "moderate" pace, American Express says U.S. consumers' spending trends remained solid and, in the case of Amex cardholders, they are willing to pay fees for cards that come with the right features.

For ISOs, it's hard to watch someone else deliver payment services in their place.

Ever since PayPal took control of Venmo as part of its 2013 purchase of Braintree, it has woven Venmo into more and more of its products. Even other acquisitions aren't immune to the spread of Venmo.

In seeking to establish a London-style Oyster card system in its city, Manchester officially launched its contactless payments capabilities on the Metrolink Tram.

Merchants outside of China who have the QR code technology to accept Alipay and WeChat Pay are part of a growing trend to serve Chinese tourists who are comfortable paying via their smartphones.

Samsung has reached an agreement with an online marketplace for financial products in India that will allow consumers to apply for credit cards and loans through the Samsung Pay app.

Interchange rates on payments in the fuel and energy sectors can be so complicated that energy marketers can lose thousands of dollars a year because of mistakes they make in coding their authorized credit card transactions.

As the urban mobility trend of scooter rentals continues to grow, PayPal's Hyperwallet will have a role in handling outbound payments from rental platform Lime to its network of freelancers who recharge the fleet of scooters.