This is how any adequate business behaves.
It is important for business to sell you its services. It does not matter whether it is a casino or a restaurant or a clothing store. All of them are united by one goal - to sell you services.
Perfectly said. It's a business and the goal is to keep you inside and continue patronizing them, they'll give you special treatments making sure that you'll going to keep coming back.
The more you are within their environment, the higher the chance that you will spend more money.
And that's where their business will earned a lot from you, the more you spend the more they'll collect and bank profits.