Look up his articles on App Store policies. He's been a pretty vocal critic.
http://daringfireball.net/2011/03/dirty_percent
To me it seems like apple is implementing not only a tax on all apps that run on the device, which has been there from the start and is ok. As a customer I like the fact that the apps are centralized and under quality and security control.
But the new move seems to be a tax on ALL MEDIA played on or loaded on the device. I don't want apple to control the data I load on my device, and this is what they're doing.
http://daringfireball.net/linked/2011/03/03/marco-disagreeme...
ubernostrum should not have been downvoted. Gruber has consistently been highly critical about other App Store policies:
http://daringfireball.net/2008/09/app_store_exclusion http://daringfireball.net/linked/2010/04/16/scratch http://daringfireball.net/linked/2010/04/16/app-store-reject.... http://daringfireball.net/linked/2009/09/29/isinglepayer
The only thing more consistent than Gruber's support of Apple is the ad hominem attacks inevitably made against him.