How many copies does a typical Mac application sell? What are the margins, marketing expenses for comparable apps in both worlds? Or are mobile apps almost al

How many copies does a typical Mac application sell? What are the margins, marketing expenses for comparable apps in both worlds? Or are mobile apps almost always tinier and less capable or just too different to compare? And do you even have to sell your app in the new store? Or will you have to because you will now suddenly have competitors? Is your app that easy to duplicate or is it that selling will be so much cheaper or it will be easier to get attention? And if its not better in some way, why would you stop selling your app the old way?