It wouldn't, necessarily, have to be excessively modular. Say, one in-app purchase, the "2012 Feature Pack", or some such. That said, I'm not convinced its a

It wouldn't, necessarily, have to be excessively modular. Say, one in-app purchase, the "2012 Feature Pack", or some such. That said, I'm not convinced its a better idea than just creating a new FooBar2 app in the store and pushing an update to FooBar1 advertising the launch sale of the new version.