He answers this in the section titled "Why I Created Binary" on the web page.
6 karma · joined September 30, 2010
To motivate myself to complete it, I created the app record in iTunes Connect before I started working on the project. This gave me 90 days before Apple would take the name away. I plan on using this trick in the future when working on small apps.
Here are a few promo codes:
PJJLMMXX976L RKHAR9KXR3YM L7TY7LMXYJHF ANNH76FF7NPP 4TF63T9F49WR
Let me know what you think!