Most likely because they use mechanical turk (people) as per this reddit discussion :) https://www.reddit.com/r/MachineLearning/comments/356e76/ask_rmachinelea

Most likely because they use mechanical turk (people) as per this reddit discussion :) https://www.reddit.com/r/MachineLearning/comments/356e76/ask_rmachinelearning_is_this_cloudsight_api_just/ https://www.reddit.com/r/MachineLearning/comments/356e76/ask...