Marco really nailed it. He was also exceptionally level-headed considering that his application, Instapaper, is likely to find itself in exactly the situation he outlines. Marco's plans for Instapaper are based around paid accounts for API access, which would enable third-party apps for paid users. It would be an absolute shame if Marco's app weren't allowed on iOS. Quite honestly, if Instapaper, Dropbox, and Evernote are under threat to be removed from the App Store, I won't even consider a new iPhone until Apple revises its policy.