Probably a bit off topic: why all contest organizers want the project to be tweeted. There is one more contest (http://news.ycombinator.com/item?id=3501355 http

Probably a bit off topic: why all contest organizers want the project to be tweeted. There is one more contest (http://news.ycombinator.com/item?id=3501355 http://news.ycombinator.com/item?id=3501355) posted today. I understand that the organizer gets visibility, but any other advantages?