The document discusses the rise and potential fall of crowdsourcing. It notes that while some crowdsourcing initiatives have been successful, not all live up to expectations. Barriers to success include difficulties making people aware of initiatives, getting people to contribute, and keeping contributors engaged over time. As more crowdsourcing sites emerge, they will compete for limited crowd resources, potentially decreasing participation rates. Only initiatives that offer high rewards or connect to major brands may sustain long-term business models relying solely on crowdsourcing. While crowdsourcing shows promise, many initiatives are likely to fail due to challenges in participant awareness, engagement, and retention.