Re/code: Twitter has been deliberate in its rollout of Buy buttons. But it’s about to make a bigger splash. The social network is said to be in the process of integrating with Shopify and other e-commerce software companies to offer its Buy buttons to a much wider range of businesses, big and small. Shopify alone has somewhere around 100,000 merchants in the U.S. that use its software to run their online shops. With a Twitter deal, those businesses would be able to sell their wares within tweets using Shopify’s software.