Over the past couple of weeks there's been some focus on the fact that Zynga, maker of social games such as Farmville, had a big decline in users during May. Back in January we predicted some fatigue with those games, albeit in the context of ongoing big growth. The decline for Zynga and its flagship Farmville tend to shine a light on a number of issues that need to be … [Read more...] about Three reasons social gaming on Facebook is declining