Well according to the site it's set up to help people, every word you get right donates some rice to some people who need it, though I don't see why they couldn't just go ahead and donate anyway.
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"They do, but what do you think is on the radio? Meat sounds. You know how when you slap or flap meat, it makes a noise? They talk by flapping their meat at each other. They can even sing by squirting air through their meat." - Terry Bisson