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YouGov is an opinion poll/ survey panel based out of London, UK. Stephan Shakespeare and Nadhim Zahawi founded YouGov in May, 2000. Within that time, this survey panel has become the market research industry leader. With an impressive nine million members and counting, this market research company dabs into the more controversial topics. You can make money by answering surveys. While it doesn't offer a direct referral reward, it does give great rewards to surveys you can apply to participate in. It is a serious, professional, reliable and paying platform.