before, but Flurry's latest round of analytics -- which measured revenue of 11 million daily active users from mid-January through the end of February 2012 -- shows Amazon's Appstore pulling in a shocking amount of revenue given the short life that it has lived. Apple's strength in sales has been well documented, but the latest report shows that for every $1 generated in the iTunes App Store, $0.89 is being spent in the Amazon Appstore. Looking more broadly, the numbers show that just $0.23 are generated in the Google Play halls for every $1 spent in the App Store, but that's hardly a new phenomenon; the ease of sideloading (amongst other factors) has raised complaints from Android developers for years now. Flurry's conclusion is that Google's core strength simply isn't in running a store -- something it's about to do once more with Android slates -- while both Apple and Amazon excel in doing just that. Curiously, Windows Phone and BlackBerry were left off of this report, but we're hoping to see those cats thrown in the next 'go round. After all, RIM sure seems certain that its developers are making out just fine.