Regardless of who benefits between the two then I can only say that they are just part of the industry that serves your needs. Nothing is free and both use their customers to make a profit - it's worth it for what and who they serve, right?
That’s correct and I believe both of them benefit a lot from the gamblers so its a win win situation for both parties and as long as they continue to provide quality casino and games, their goal will remain intact. Gamblers are the one who are suffering here, we all know how the casino works and I believe some brokers are also connected with the casinos since they have to get a better partnership or else they will not make money here.
Its their business so there's money involve for sure and with Broker, they are doing this since then, it takes a good profit for you to stay with the gambling industry.
If there's a secret partnership with both parties just to take advantage of the gambler then its scary, better not to use any broker or any third party games if you're afraid of this.
Casinos can't do everything alone, and having a broker or a third party provider is the best option for them to offer a great services.