Got Any Sites Thru Which You Earn???

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I was wondering if there are any more sites out there apart from duno (working on lottery system), Algoco (god knows whn it will be in action) and payposter that are willing to pay for postings discussions or responses or taking surveys to surfing for money.......i have been trying to search for some but all of them require some payment.....should i pay and join or consider it to be a spam