Ok, I'm mainly doing this because I'm bored and I don't play much so I don't see a point in keeping my stockpile of gold. All this "contest" requires you to do, is post.
How does it work? Once in a while, I'll add "xyz" after one of my posts, at random. All you have to do, is be the first one to quote that post saying "abc" in your comment.
The prize? 10k each time. Yep, just for replying to a post.
Goes on forever, at least until I run out of gold. Good luck
Lost of current winners- Livemau (gold not received)