Facebook recently launched the European Incentive Program. As its name implies, it's a new incentive program for Europeans, designed to reward developers that drive a high volume of Facebook Credits transactions in the continent.
More specifically, any developer that drives more than $100,000 USD in sales to European customers in a given quarter will be rewarded with an additional 3 percent related to those sales. The program is already in effect. Payment for January 1 to March 31, 2012 will be made at the end of April.
Facebook says it will be evaluating the program quarterly. Based on how it does, it may or may not be renewed. In other words, take advantage while you still can!
It's not clear why Facebook is limiting the test to Europe, but presumably Facebook Credits is not picking up there as well as it is in the U.S. and/or other parts of the world. Facebook has a lot of European customers though, and if the social networking giant is betting on Facebook Credits as a solid new revenue source, it has to think hard on ways to push it forward.
Facebook also reminded developers of two upcoming breaking changes on April 1, 2012:
Removing support to claim Domains using Page ID: Facebook will deprecate the ability to claim domains with a Page ID. The recommended option for claiming domains is with an App ID or User ID and existing domains that have been claimed will continue to work fine. After claiming domains, owners are able to view insights or run Domain Sponsored Stories (see Domain Insights as well as Facebook lists supported and deprecated SDKs).
Making deprecate SDK repositories private: the Python and C# SDK repositories on GitHub will no longer be available publicly. These repositories are deprecated and may not work as expected due to changes in Facebook's auth system (see Platform Roadmap).