RockYou of Redwood City, Calif. acquired Playdemic . Financial terms were not disclosed. The purchased U.K.-based social game developer will operate independently to develop Facebook games. Paul Gouge, Playdemic’s CEO and founder, will lead the studio as a vice president and general manager.

RockYou, a San Mateo, Calif.-based developer of social network advertising widgets, has raised $10 million in new funding from existing backer Softbank. The company has now raised a total of $127 million, from Softbank, SK Telecom Ventures, DCM, Sequoia Capital and Lightspeed Venture Partners.

RockYou, a San Mateo, Calif.-based developer of social network advertising widgets, has raised $50 million in new VC funding from existing backer Softbank. The company previously raised, from Softbank, SK Telecom Ventures, DCM, Sequoia Capital and Lightspeed Venture Partners. www.rockyou.com

Over the weekend, TechCrunch’s Michael Arrington suggested that Lightspeed’s new $15 million investment in Ning — whose online platform invites people to create their own social networks — boils down to one word: Marketing.

Lightspeed needed a sexy social networking startup to add to its portfolio, he wrote, adding: “Do they expect to see a big return on the investment? Almost certainly not. But they also haven’t put their money at extreme risk. They likely have a liquidation preference that lets them get their $15 million out of the company before others can take part of the pie. So effectively, they just bought themselves a bunch of marketing with their limited partners’ money…LPs [who] don’t really mind.”

RockYou, a San Mateo, Calif.-based developer of social widgets, has raised $17 million in additional Series C funding from Softbank and SK Telecom Ventures. The company previously held a $35 million first close on the round led by DCM. Other company backers include Sequoia Capital and Lightspeed Venture Partners.