An International Game Developers Association e-mail on Thursday attacked the Amazon Appstore for hurting the prices for games. A no-better-price rule that prevents even temporary price drops at rival Android app stores is believed to be forcing an unfair choice on game writers, who either have to avoid price cuts and risk losing sales or else hurt profits by cutting the price everywhere at the same time. They also criticized a familiar Amazon practice of discounting an app price on its own, which they saw as punishing developers by taking the profit out of a strong-