Marco Arment, the creator of Instapaper, weighed in with his thoughts on the future of the Mac App Store. He argued that, unless Apple changes some of its rigid policies, the Mac App Store is doomed. He pointed to the recent departure of the email client Postbox, which in part was the result of Apple's strict sandboxing requirements, as an example of what the future holds for the Mac App Store.
Because of Apple's policies, Arment predicts that an increasing number of developers are going to leave the Mac App Store
