San Francisco--Also targeting small businesses, Allbusiness.com said Tuesday it has hired an executive to lead affinity marketing. The startup, which went live last month, has hired Patrick Turpin as VP-e-commerce. Previously, Mr. Turpin was VP of executive membership services for Costco, a wholesale retailer with 26 million registered customers. At Costco, Mr. Turpin developed programs for health insurance, credit-card processing and business loans. Mr. Turpin will likely oversee development of similar services at Allbusiness.