Curious about Storymash.com

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What do you guys know about Storymash.com, if anything? I just stumbled across their website a few minutes ago, and it seems like an interesting (possibly entertaining) premise. Writers collaborate on stories, rate and discuss each chapter, and get 50% royalties on whatever they earn money from. However, I would like to know more about how this works. How do you get paid, and how often? Do you have to collaborate, or can you simply post chapters (like on fictionpress.com) and get reviews/critiques for it? How much do you get paid for every chapter you post? If anyone knows or wants to help me in my research, please let me know! Thanks in advance for anyone who can help me out!