I think they was a misunderstanding Sison. I thought you were referring to these post.
https://plarium.com/forum/en/stormfall-age-of-war/tavern/40205_meme-contest/
In that post a moderator , can't win, no matter how funny is his post. Moderator initiated contests, can't be won by moderators. Its like rewarding a maths professor for answering a maths question. Yes the maths professor can win when the contents is tricky challenge aimed at maths professors, like a Nobel prize.
If you read the rules regarding contests, you will notice that moderators have a power to change a contest question or challenge, perhaps when something is wrong in the challenge, a mistake ect and other conditions meriting such a change. So lets say Brunson start a contest, I can change those conditions, and the entire question and easily win.( they should be a warrant change). Or we can form a conspiracy to let each other win, I start a contest and announce Bio as a winner, he does the same and announce me as a winner. See why moderators can't win in moderator initiated contests.
But its not always, sometimes moderators win.
Like if the wasn't any more entry here then warrior can win.
https://plarium.com/forum/en/stormfall-age-of-war/game-discussion/33634_wiki---league-achievement-article-contest/
But in administrators initiated contest and those initiated by the CM, then all players can win.