it's all about understanding that participation in UGC is multi-layered. just like in FOSS projects, in Wikipedia, human search, crowdsourcing sites, etc, some people are hard core contributors while others are bug-reporters, fact-checkers, type-correctors, forwarders, etc etc etc. In each of these systems different people can contribute to different degrees their time, skills, and efforts. On these terms, experts are not different form lay people.
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it's all about understanding that participation in UGC is multi-layered. just like in FOSS projects, in Wikipedia, human search, crowdsourcing sites, etc, some people are hard core contributors while others are bug-reporters, fact-checkers, type-correctors, forwarders, etc etc etc. In each of these systems different people can contribute to different degrees their time, skills, and efforts. On these terms, experts are not different form lay people.