Another day, another social network makes it easier for consumers to purchase goods without leaving a retailer’s social page. Pinterest is adding three major new e-commerce platforms and a whole bunch of retailers to its existing “Buyable Pins” feature. The social network is adding support for Bigcommerce, IBM and Magento (eBay’s e-commerce platform offering) to its Buyable Pins feature. The feature, launched in June with Demandware and Shopify, lets consumers tap the “buy it” button on a pin they like and immediately purchase the displayed item with Apple Pay or credit card. Personal info can be saved to make purchases even faster. More here.