Walgreens has followed in the footsteps of Walmart and Amazon to join the retailer-as-ad-agency trend, while BigCommerce recently launched Open Checkout to let developers, retailers and partners create tailored checkout experiences. In merchant innovation, an increasing share of consumers are tapping into mobile devices and laptops to do their shopping or make their journeys to physical retail stores more efficient. And in B2B payments, virtual cards are helping firms manage spend in real time. All this, Today in Data.