I'm on the same boat as the author but mostly because I've lived in 3 different countries in the last 2 years, and had to register for iTunes with 3 different c

I'm on the same boat as the author but mostly because I've lived in 3 different countries in the last 2 years, and had to register for iTunes with 3 different credit card locations. My iPhone has apps and Audiobooks from all these 3 accounts and I cannot reliably keep them updated, sync-ed, and backed up with iTunes. It's a mess and it keeps me from using the iCloud services properly. The iTunes & App Store experience is great for mainstream use cases but painful if your situation deviates from the norm.