Interesting article: http://www.cnn.com/2009/TECH/12/09/wired.apple.apps/index.html
A Chinese-based company made a bunch of crappy iPhone apps (mostly bad clones of other apps) but managed to bubble them to the top of the iPhone App charts. How? Probably by paying random customers to download the apps and to give high ratings. Apple responded by booting this company off the app store completely, including all their apps – all 1000 of them!
At Redfin we have a free iPhone app. We noticed that the number of people who download our app in a given day increased significantly when we were listed in the “featured apps” list. But, somewhat surprisingly, the number of downloads didn’t increase so much when our app was featured in the recent iPhone television ad.