Through Original US Apple ID u can download all types of apps, games, movie, songs as much as u need,
which is not possible to other ordinary iTunes ID.
Basically ordinary ID has limitation to download. But USA/UK certified ID has no Limitation,
besides lifetime validity.
Apple ID / iTunes ID (you can use for Ur iPhone 5/ 4G/ 4s/ 3Gs/ 3G/ iPod/ i Pad/ Mac book)