Crowdini is a free question and answer knockout contest where you are trying to master the wisdom of the crowd. All the questions have no right answer, they are preference or experience based. You answer one question a day and if your answer is the majority answer you continue on in the contest. The contest ends when there is only one person left. A new contest starts everyday. Every contest has a prize to the last person left. US Residents 18+ are eligible.
Last updated 15 Feb 2013