Do you actually make a living selling those 99 cent apps on App Store? As in, you don't have another day job?
That's pretty hard. Very rare.
Saying the app store and its execution weren't a great revolution shows that you are totally ignorant of how software was made and sold only a few years ago. Small developers for software really didn't exist. Nobody pays for shareware, and making a living as a small dev was basically impossible. The app store basically recreated the hobby developer market, period, and brought it to a level of mainstream that was never attained by normal PCs.
That's not true at all. Small devs sold on their own website (and they still do). I bought all kinds of Windows software from small devs. A few examples of stuff I bought (there are many others but not all of them are still around):
flashpanoramas.com
sourceguardian.com
supertintin.com
easypano.com/virtual-tour-software.html
They have trial versions they distribute on download sites like CNET download.com. If you like it you buy the full version. This model works. Yes there's piracy but if your program (let's not call it an app) is good and useful you'll get many paid buyers.