The other day, Rovio released their popular Angry Birds game on the Android Market. It immediately got 1 million downloads on day one and has over 2 million by now. What’s more intriguing is that this $0.99 app on the iPhone is offered free on Android.
Rovio sold over 6.5 million copies of Angry Birds for iOS in August. At $0.99 and less the 30% cut of Apple, they netted about $4.5 million from the iTunes App Store. That doesn’t include the $4.99 app for the iPad.

After being downloaded 2 million times for Android, Rovio made a total of $0. The full version of Angry Birds for Android is ad-supported. That remains to be seen how much they will eventually make out of it.
For developers, it looks like the iOS makes for a better environment to make money from apps compared to Android. Rovio could have also sold it at $0.99 Android Market but they opted not to. A paid app is certainly much better than an ad-supported app from a developer’s perspective.
Here’s a question — if you’re an App Developer, would you rather make your apps free but ad-supported or go straight for a paid app?

OT: Thus I marked it as OT.
Oh yeah, the price to pay for Google is your privacy.
It’s naive to think the Google is not one of the “evil companies”.
You can only indulge about Google as a fan, but as you already said you can research all about Google’s behaviors as the monopoly of search.