The tournament is probably one of the most successful marketing for a casino, I have no real data for that haha, just a guess. It is fun, engaging, and most of the time profitable for the players. It could be free to play or you need to wager, get on the top, or do the quest before anyone does. It is good to have an announcement thread so that their community can grow. It also helps them with their sales, marketing, and the quality of their support.