Apple is reaching for 50 billion downloads and at present at Apple the download reaches 49,262,xxx,xxx as of now. To celebrate this apple has launched the contest. For the person who downloads the 50 billion app will could get $10,000 Apple store gift card by Apple.
The reach Apple download counter page click here
The official rules for the contest are available at www.apple.com/itunes/50-billion-app-countdown/rules/.
No purchase is necessary for the contest and only form filling is needed with is available in the Apple counter page. You can also have a chance to win $500 and the other details on the official webpage of Apple contest page.
All the best and I will also try for it.