I read about what the new Earthcoin forum is doing and I believe Netcoin(NET) did the something similar. When you make a post, new topic etc you are credited a small amount of coins to your account. Since the DTC forum is need of more traffic we could try something similar? It seems to me it is a good incentive for new adopters/users.
-From EAC forum;
"Here is a quick overview: posting, replying, uploading media, updating profiles, making friends, joining groups, writing Docs and Wikis, and sending invites all give rewards. Deleting posts and replies, and having posts marked as spam deduct from your earnings."I have no idea what it would take to "code" this into the forum(IDK if I'm even using the right words). Giveaways take time and cost quite a lot. Giving user a small amount like this is a self-driven process after it has been "coded", except for the moderation of spam. No double checking user accounts on bitcointalk, no checking twitter for replies, no checking to see if the wallet-address is used over and over for more coins.
For example; 0.05DTC per action = 1DTC per 20 actions. As time goes by and more users registers, the reward can be lowered until there is enough activity on the forum and the reward is 0

0.05 might be too much, I am not experienced with how much traffic this could generate.
just a thought.