During Apple's Worldwide Developer Conference keynote, CEO Tim Cook announced that the iTunes and App Store have 575 million store accounts and noted that Apple believes it has more accounts with credit cards than any other company on the Internet. Asymco's Horace Dediu yesterday used the new figure to take a look at the value of an Apple user to the company. By plotting Apple's previous milestones all the way back to 2009, Dediu found that Apple is adding about 500,000 new iTunes accounts a day and that the company is on pace to add another 100 million accounts by the end of the yea
