What would you do with a $10,000 iTunes gift card? That’s a lot of Ke$ha singles and fart apps. Apple is giving away just that to the luck person who downloads the 10 billionth app from its App Store. The company is well on track to hit that milestone–as of this morning, around 9.76 billion apps had been downloaded. Giving away a boatload of free downloads is likely only helping the counter spin away.There are some rules of course–users are limited to 25 downloads a day, automated software will disqualify you, and you’ve got to agree to let you name and image be used for Apple promotion.