Mobile advertising firm found that the Amazon Appstore generates 89 percent of the revenue for in-app purchases, while Google Play only earns 23 percent. That’s a significant difference.

“Amazon's bet to fork Android in order to put consumers into their own shopping experience on Kindle Fire appears to be paying off,” argues Flurry’s Peter Farago.

is a key part of Amazon’s success in convincing us to hand over our hard-earned cash. There are several reasons for this: first off, Fire users cannot easily download popular apps from anywhere other than . Like iTunes, the Kindle Fire is tied to a single source for content.

Apple uses this to great effect in its own mobile content strategy, and as a result has built a considerable business as the entire iOS ecosystem matures. The platform is on lock down, and all the revenue funnels back to Apple. The device becomes the storefront. It's genius.

Apple and Amazon’s Retail Experience Is Key