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.
When you make a purchase in the iTunes Store, Mac App Store, App Store, or iBooks Store your account will be billed at the time of or shortly after your transaction. If you use a credit card or PayPal account for a transaction, Apple may obtain preapproval for an amount up to the amount of the order.our credit card or PayPal account is then charged for any remaining balance. When you buy individual songs from the iTunes Store: 1  Free song credits are redeemed first. 2  If you have no free song credits, then your gift certificate, prepaid card, and allowance credits are used next.