If you don’t back up your games and song packs, you’ll lose them for good.
The deal that Harmonix and EA have regarding licensing ends next Tuesday, and that means iOS owners might be getting boned. If you own either ‘Rock band’ or ‘Rock Band Reloaded’ for your iOS device, you’ll need to back up your data before the 31st or you’ll lose it. All of it. Permanently.
If you still want to buy one of these games, you can still do so. But, just like current owners, you need to pick it up and back it up by next Tuesday or it’s gone for good.