snip
It could be true. But if the casino wants to make more and spend more, the casino needs to calculate its budget before starting the promotion so that it is ready to compete with other casinos.
With many casinos operating, it will provide an opportunity for each casino to provide good service to its customers. If the customers are satisfied, they can get higher trust from the customers, increasing their rating among other casinos.
Trust rating will always depend on how the casino perform since if they show to their community that they are really fair and can able to solve the issue if there is especially if it involves a huge amount of money then they can gain that from people.
But since we are talking about marketing the only thing they need is money and consistency on what they are doing also they should add something fun which people can interact with them. And maybe they should look how big casino do promotions in games in rounds since most lf the casino post their contest and other fun games.