crowdsifter logo CrowdSifter raises $50,000 for content filter op CrowdSifter, a content-filtering service that uses a crowd of viewers to flag obscene and violent images, raised more than $50,000 from This would help CrowdSifter to better the service, dealing in content moderation of pornography and user-generated content. The service is run by Dolores Labs, where Lukas Biewald is the chief executive, and targets moderation of Internet content to appropriate users bases.