If this competition were to appear in game, as s5carrot says it would have to be organised and designed by the game developers at Innogames, and as such would then appear on all the different language servers. this would take their time away from designing and refining the main elements of the game.
As it is, this forum based competition was designed and run by the admin and support team (most of whom are volunteers) on the English International server. They have provided those who wish to participate with a fun, interesting and varied series of tasks and questions with the promise of some prizes, in addition to continuing to provide a high level of ingame support and run the forums here. I know it involved a lot of extra work for several members of the team.
Running a competition in this way has encouraged more players to look at, register on and use the game forum, as well as exploring the detailed game information available on the wiki and - in my fellowship at least - increased communication between players.
I'd like to say a big thank you to all those involved in running this competition for us players - i think you did a great job!