 Launched in 2006, the original Cambrian House community attracted 50,000+ members and more than 7000 ideas from the crowd.Weaknesses in the idea-community model included the challenge of convincing users to read and rate a rapidly growing pool of ideas, the relatively low quality of some ideas, the management complexity of distributed development, and the large number of duplicate submissions.These weaknesses have been successfully overcome by other companies including InnoCentive, IStockphoto, and T-shirt design company Threadless.