From iGaming Business Eight leading social games companies including Plumbee Limited and Zynga Incorporated have joined forces to officially launch the International Social Games Coalition. The International Social Games Coalition was first informally premiered in April at a meeting in San Francisco and stated that it will now showcase the industry’s work and ‘educate people about free-to-play games on the Internet’. “The social games industry is at the heart of our emerging digital economy, so as it continues to grow it is essential that the sector has a collective voice,” said Luc Delaney, a former senior executive with Facebook and…