I think what he wants the data to show is that an app that's priced above a dollar can be at least as popular (and substantially more lucrative) as a 99 cent app. The distribution of popularity for >$1 looks indistinguishable from the popularity for <$1, in most categories. (excluding free in this)
That indicates that, even though there are a huge number of 99 cent apps, there isn't a strong correlation between that price point and the app's popularity/success. So a developer doesn't have to aim at the 99 cent price point just to make a profit.
That indicates that, even though there are a huge number of 99 cent apps, there isn't a strong correlation between that price point and the app's popularity/success. So a developer doesn't have to aim at the 99 cent price point just to make a profit.