Great comment.

I just wanted to bring up a point about free-app/knock-off vs. paid quality app.

I would draw a parallel with the fashion industry. Louis Vuitton, for example, will never go out of business because of Chinese knock-offs. Why? because the person who buys the knock off/cheaper product is not their target customer.

Same I think is true with iPhone/iPad apps. Those users who only search for free apps and put up with disruptive ads (let alone click on those ads) are not the target audience of a premium application maker.

Where the cheaper app maker has to churn out dozens of products to make decent revenue, a single app maker who focuses on quality and sustainable business model can really build a meaningful business in the App Store.