What is security like on Amazon's appstore? It has all-encompassing permissions. always online? Must the apps be used online, for monitoring usage and download

What is security like on Amazon's appstore? It has all-encompassing permissions. always online? Must the apps be used online, for monitoring usage and downloading ads - or can they be run offline, with the Amazon appstore app uploading stats/downloading ads when connected? (I ask this because I run games in "airport mode" and "stop" them afterwards, as a security measure, having been burned).