Super Meat Boy had the backing of the xBox store (they were promised a feature page release) and several major gaming websites/magazines wrote pre-release artic

Super Meat Boy had the backing of the xBox store (they were promised a feature page release) and several major gaming websites/magazines wrote pre-release articles or reviews for it ... plus they got the tail end too with The Indie Game movie which I'm sure added some later sales numbers for Meat Boy, Fez and Braid.