The Wii U lost them money up until early this year. Once they started getting some big games on the market which really started around this time last year, they have been able to push stronger sales numbers because of increased numbers in game releases. Mario Kart and Super Mario 3D World really started accelerating their sales numbers for the console. Even if they lost money on the system, the 3DS has been making enough money to recoup those losses with game sales and a consistent flow of system sales.