I wonder how much traffic comes from contests though, in my mind, I always believe a signature campaign is the best way to build a brand since a member can post anywhere so the exposure is not limited to one board/thread. That being said, I do see a business that regularly hosts a contest on Bitcointalk, so I guess it brings decent traffic. But if they have a budget to do that, wouldn't adding more signature spots or buying the forum ad slot be better?