I don't think it's necessarily true that good games will sell. Some will, sure, but others may not. There are massive numbers of games that fly under the radar

I don't think it's necessarily true that good games will sell. Some will, sure, but others may not. There are massive numbers of games that fly under the radar and never really catch on, and some of these are bound to be good. Like anything else, there's an element of luck involved. Simply being good is not enough. Price per MB seems like an attempt to capture the amount of work that goes into a game, but I agree it's not a great metric. You can decrease price per megabyte just by shipping models and textures with higher resolution, even though they don't cost you anything more to create.