When Rousseau wrote his social theory, concepts of liberty and freedom were not new ideas. Hints of social contract reasoning are found in earlier works, most notably in Book 2 of Plato's dialog The Republic, as well as, in Socrates.
The total spending per iTunes account is $43 per year across all media, says Dediu. At 575 million iTunes accounts, that works out to $24.7 billion of consumer spending at iTunes per year. The average iTunes account's annual spending on software has followed music's trend, falling to $9 from $42 in 2008. However, average annual spending on apps has gone in the opposite direction, rising to $16 this year from $7 in 2008.
About cards and codes. iTunes Store Gift Cards: 1  When you redeem an iTunes Store Gift Card, the amount of credit on the card is added to your iTunes Store account. 2  You can use it at any time to buy items in the iTunes Store, App Store, or iBooks Store, pay for in-app subscriptions, or make in-app purchases. Click your name, and choose Redeem from the drop-down menu. 2  Enter your password again. 3  If you have an iTunes Store Gift Card, enter the 16-digit code, which starts with X, from the back of the card. 4  If you have a promo or content code, enter the code from the back of the card.