You can use the forum achievements to get Achievement Points on the forum.
And with the Achievement Points you will be able to get special items or other stuffs.
- 100 points: Nothing yet
- 200 points: Nothing yet
- 300 points: Nothing yet
- 400 points: Nothing yet
- 500 points: Nothing yet
(With Achievement Points you will get no reward at the moment! But it is good to get them now.)