As long as I remember, they have never provided exclusive promos for bitcointalk users only.
There were some contest by BTCgosu that can be played in bc.game only but I believe the prize came from Gosu's pocket.
Now they provide a survey with a reward to bitcointalk users so maybe we can hope to see more exclusive offers in the future.
More than a week already and the 100 availble slots for the survey is not fully filled yet, I'm a bit surprised because usually something like this (free money) is claimed so fast 

Users will receive a $10 claimable bonus code with no wager requirements in their Bitcointalk PMs once we've reached 100 eligible responses.