"nobody knew the Steam version would exist when they bought this one." and you are completely right! Not even Mike himself knew that his game would blow up and that he would have the chance to get one of his passion projects further than he would have ever imagined! so his cheaper sandwich gets discovered by subway and gets a polished up variant in their stores to buy just because it is that good! Mike saw the opportunity to develop and polish his game further. I would do the exact same thing.