#facebook For the past couple of years the social network Facebook and the social gaming company Zynga have enjoyed a rather cozy relationship. Zynga games have been a substantial source of revenue for Facebook, and the game maker has relied on the network to drive millions of players to its stable of titles. It's been a good run, but with Zynga-driven Facebook revenue dropping and social gaming evolving, new agreements downgrade the companies' relationship to just friends. More »