Reputable Photo Contest Sites

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I have been searching all over for some reputable online photo contests and figured a great place to ask would be here. While I know the internet is useful and you can search I'd prefer to know about a scam before I enter it. I have found one thus far that seems to be really good which is www.competico.com. Have any other photographers looked into entering photo contests online if so where did you go and was it legit. I'm just look to enter a few and wanted to know what others have done.