With Google I/O 2014, Google switched to a lottery-based system for selling tickets. This means that anyone can register for a spot in the draw, but only a select number of people will get the opportunity to shell out $900 for a ticket. This, of course, means that no one is guaranteed entry into the event. It wouldn’t be Google if they didn’t throw some fun into the process. Only this time, the fun guarantees an entry into I/O (via Android Police).
Google has placed a handful of goog.gl links throughout its Developer sites, including within images, texts, and even the source code of pages. Unfortunately, each link is only valid for one spot, and Google doesn’t remove them when they’ve been claimed. So more than likely, any link you find has already been claimed.