For a while, the Amazon AppStore was the great beacon of light, the savior of Google’s terrible Market, here to review your apps and games and promote them. Then the IGDA came to the rescue:
From the missive:
…if you ever conduct even a temporary price promotion in another market, you must permanently lower your list price in Amazon’s market.
The IGDA’s point is crystallized a bit lower:
The IGDA’s bottom line is simple: under Amazon’s current terms, Amazon has little incentive not to use a developer’s content as a weapon with which to capture marketshare from competing app stores.
In other words, if you want to have full control of your product, stay with the Google Market and the several other stores.
Better yet, get an iOS Developer Account and buy a cheap Macbook Air.