It takes hard and smart work to launch new things in making casinos, especially with the many already running casinos. The owner must be able to think about what they must do to attract many customers. They can add new things that have never existed in other casinos to attract their customers.
Reducing or adding games can be done after the casino is launched and it will be considered an update to the casino. What is important is how they can provide better service than other casinos. Gamblers will feel a different service if the owner can provide the best for his customers.
When everything is running, the owner must carry out promotions to develop the business. This is to be able to get more customers. In addition, existing services must be further improved.
I can't imagine what kind of new things must be added when they create a new casino, because obviously with promos or bonuses they will definitely be added. Apart from that, this requires hard work, in fact I don't think they can do it alone, of course they need other people who are experts in their field, as you said by attracting lots of customers or marketing. This clearly must be paid attention to, and of course it is not easy to attract other people or get many people interested in the new casino that is being created.
with that service, that's for sure, because all casinos will definitely provide the best service to each of their customers because that will make them comfortable and trust the casino they are going to. because this also determines the reputation of the casino itself, if they provide bad service it may give their customers a bad reputation. Apart from that, in my opinion building a casino is not an easy thing, there are many aspects that must be taken into account and must be considered carefully, because this is clearly a business.