Instagram has officially announced it's hit the 100 million active users mark.
The social photo sharing app remains the most prevalent network for sharing images worldwide. Launched in October 2010, the platform has seen exponential growth since. The app actually reached the 100 registered users mark by September 2012, according to Mark Zuckerberg, CEO of Facebook, which purchased Instagram at a $1 billion pricetag in April of last year. Today's 100 million users number refers to those who
