While Zynga looked like it was putting out feelers to move away from Facebook, the two partners have wedded themselves to each other. Zynga and Facebook released a joint statement announcing a five-year partnership which will see an increased use of Facebook Credits in Zynga s games.

Facebook was a pioneer in opening their platform in 2007 and in just three years tens of millions of Facebook users play our games every day, from FarmVille and Café World to Treasure Isle and Mafia Wars, said Mark Pincus, founder and CEO at Zynga. We are excited about Facebook’s long-term commitment to social gaming and Zynga, and look forward to working with them and other platform providers to bring the best social gaming experience to users worldwide.

We are pleased to enter into a new agreement with Zynga to enhance the experience for Facebook users who play Zynga games, said Facebook chief operating officer Sheryl Sandberg. We look forward to continuing our work with Zynga and all of our developers to increase the opportunities on our platform.

This union will no doubt be better for both parties, since Facebook will reap the rewards of greater revenue and Zynga will continue to be a force for advertisers on the social network site.