Shortly before 5 p.m. ET, Apple officially hit the 50 billion app mark on the App Store. The grand prize for achieving this is a $10,000 gift card redeemable on the App Store and $500 App Store gift cards to the next 50 customers following that. We'll let you know the winners as soon as they're announced, and congratulations to Apple for hitting the milestone!App Store hits 50 billion apps downloaded originally appeared on TUAW - The Unofficial Apple Weblog on Wed, 15 May 2013 17:00:00 EST. P