Why did the Marshall Plan not help countries of Eastern Europe?

The Marshall Plan, officially the European Recovery Program, was U.S.-sponsored program of economic recovery for Western Europe following the devastation of World War II. The goals of the Marshall Plan were to rebuild shattered European economies, remove trade barriers, modernize industry, and make war-ravaged countries self-sufficient again. The main reason countries of Eastern Europe did not receive aid through the Marshall Plan was because the Soviet Union, which controlled these countries at the time, refused to participate in the plan. Soviet leader Joseph Stalin believed that participating in the Marshall Plan would mean accepting US-style capitalism and losing Soviet influence over its satellite states in Eastern Europe.