Social Gaming Network, a major distributor of games on Facebook and other social networks, has added Bezos Expeditions, Jeff Bezos’ investment vehicle, to its investor roles. The news comes just two months after the Palo Alto-based SGN announced its big, $15 million first round from investors Greylock Partners, the Founders Fund, Columbia Partners, and Novak Biddle Venture Partners. Terms of this investment were not disclosed. Bezos Expeditions also recently invested in Kongregate, a game community and distribution platform with plans to do more on Facebook. More prominently, the firm recently invested in Twitter. SGN is a little vague on what it plans to do with the funding, though it could hoover up some smaller players in the space. In April it acquired small developer Esgut.