FarmVille Loses 4 Million Players Last Month, Why are Farmers leaving FarmVille?

While FarmVille is still without question the number one Facebook game, consisting of a strong 78 million active users, over 4 million farmers left FarmVille last month. It is important to mention that at least 18 out of the top 25 Facebook games also experienced significant decline in users. So why is it that most games are losing active users? Are farmers leaving the farm for treasure hunting and island adventures?

While many people are adopting the virtual life in Treasure Isle, the fastest growing game of 2010, it is unlikely to contribute to the entire loss. Many farmers can enjoy farm life and simultaneously search for treasure due to the nature of Treasure Isle's energy requirements. While providing a nice distraction when waiting for your crops to grow, unlike FarmVille, Treasure Isle and games like Mafia Wars are not always available for play since they are dependent on energy packs. So what is causing the decline in most of Facebook's top 25 social games?