Dropbox Reaches 100 Million Users, Sets Up Contest as Thank You
That’s quite a feat, and to celebrate and say thanks (and generate even more users), Dropbox is setting up a contest wherein its users share their own “Dropbox stories” of how they use the service and why.

The top 100 stories will earn those users 10GB of Dropbox storage for life; the top 10 will receive 100GB. Dropbox has even set up a page aggregating all the stories, which you can freely peruse.