IfOnly, a San Francisco-based online marketplace that offers more than 3,000 unique experiences to its adventuresome users, has raised $20 million in Series D funding led by MasterCard, which was joined by other strategic investors, including Hyatt Hotels and Sotheby’s. It has another new announcement, too: The company has brought aboard a new CEO, John Boris, who spent the previous six years as the chief marketing officer at the personalized photos and products company Shutterfly. The latter wasn’t necessarily something the company saw coming.