No, I didn't miss any point. Nobody wants to pay for anything therefore it takes very little revenue to make it to the top. Where is the surprise in this? Where is the point I missed? Of course it's going to be easy to get to the top putting a halfway interesting app out there.
The point is even when you factor in that people don't like to pay for things the Mac app store is still doing comparatively pathetic sales-wise. The point is that people are obviously not going to the app store to get their Mac apps, not that people don't want to pay money. If people didn't want to pay any money the iOS store wouldn't be the huge sucess that it is today (yes there are ad-supported apps, but even the ones that aren't ad-supported are seeing more revenue than this).