If you are very active around the 22nd of any month, you will be promoted and given the ability to add an avatar. So, just keep posting!
You need to be promoted by the system to have an avatar. This happens once a month ( not sure when). You should receive a message when you are. In the meantime, just keep posting in the forums. The more you participate, the better chance you have to be promoted.
Really? Why the 22nd?
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