Between the App Store, Steam, MacGameStore and now Amazon, Im really liking my options as a Mac gamer! Of the above, the Mac App Store certainly works the best, but having options is good. More selection, more price-shopping, more competition.
Much the same way I prefer to buy music from iTunes (MP4 format) than from Amazon (MP3 format), but if Amazon has a great deal, or an album Apple doesnt, Ill gladly buy from Amazon too.
Steam is still the best of the bunch. The App Store is okay with the occasional sales. I feel kind of sorry for the MacGameStore. And the Amazon store makes the Mac App Store look amazing in comparison. I really hope Amazon is going to do more than this. I know, how can I pass up on the amazing price reductions from $49.99 to the ridiculously low $49.99 that Amazon advertises. But I shall.