Here's what I think happened. They decided that they wanted to make a low power black and white game system for people to use while camping. They decided that a crank charger was the best solution for this and went ahead with development.
Further into the process they discovered that they couldn't get the power budget low enough to make cranking a viable option, but they were too far along to abandon it completely.
Then someone had a brilliant idea. Lets make the crank an input system, and develop crank based games.