what is this website about?

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recently one of my friends sent me a link to this website. it is associated content. but she did not send me any details about the site. all i know about it is that you get paid for uploading content. but i need more details and i cant figure out what exactly is the procedure there. how and what do we upload? what is the payment done through? and the most confusing thing was that, how do we get earnings? please help me out with these queries friends. i couldn't clearly understand myself..