With four people dedicated to chat and email responses, Memorysuppliers.com is one of thousands of ecommerce companies adding chat to its marketing and customer service mix. And why not? A February 2008 study from Forrester Research, "The ROI of Interactive Chat", found merchants with click-to-chat options (also known as "reactive" chat) earn a 15 percent return on investment (ROI) on the chat service itself. Merchants with chat invitations and pop-up windows tied to user actions (also known as "proactive" chat), meanwhile, earn a whopping 105 percent ROI.