I am not sure how I missed this contest so I might be too late for prizes but here ya go:
Each participant comes up with 3 additions to the game that they would like to see added or changed. They put those suggestions in a private message to one of your alias accounts on this site so you don't get spammed on your main account. At the end of the week or whatever period, you choose which 3 you like the best and give out rewards. You should get tons of good suggestions for the game, hopefully a lot more than 3 that might be good additions and 3 people get prizes. People can add as many suggestions as they want, but only the top 3 they choose would be for the contest. Also, you could give out additional crowns for each idea that you want to add into the game.