I don't think those charts show what he wants them to show.
A 50 / 50 split between 99c apps and all apps over 99c shows how dominate that price point is. Free is also more popular than the other two options.
Edit: They don't quantify the number of apps in each category. It does show the number of popular apps on a logarithmic scale with the most popular apps overall being free, or 99c. Also there is also a huge gap between .2 and .5 on a logarithmic scale.
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.
The question isn't how many apps are released at what price points. The question is, does a 99c app sell twice as many copies as a $2 app, or 10x as many as a $10 app, and according to this article the answer is no.
Edit: They don't quantify the number of apps in each category. It does show the number of popular apps on a logarithmic scale with the most popular apps overall being free, or 99c. Also there is also a huge gap between .2 and .5 on a logarithmic scale.