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Situated crowdsourcing has been growing in popularity as an alternative way to collect complex and often creative crowd work. However, previous situated crowdsourcing deployments have not successfully leveraged cooperation possibilities with their audiences, which can improve the data quality of deployed macrotasks. In this chapter, we present three situated crowdsourcing case studies that used different situated technologies and identify the reasons behind their missteps regarding promoting cooperation between workers. Then, based on the identified issues, we propose the design of a novel situated crowdsourcing platform that aims to effectively support cooperation without alienating solo workers. In order to gather insights on our proposed design, we built a prototype platform and evaluated it using a laboratory study with 24 participants. In general, participants were positive about the idea as it …