To earn this, you need to donate approximately 1.5 million dollars to the Shindows Shop in one play-through. This is easily done using the tab and enter method. You can also use this method to donate the money. Press tab repeatedly until the yellow outline is around the donate button, then press and hold enter. Once you do this, be sure to press the earn money button once more to unlock the achievement. This will unlock all byte/sec achievements.