Apple says this application was banned because it used a non-public API.
The American Petroleum Institute (API) reports that the U.S. imports over 60 percent of its oil.
Understanding Today's Crude Oil and Product Markets (pdf): The API offers an overview of the international and domestic markets in this 27-page document.
You will need to upload a picture of yourself to the application - this can be either from your computer or by accessing the Facebook API (using your username and password).
Facebook also has its own "Graph API" which is used to measure people, photos, events, and pages as well as the connections between them.