Advertisement and promotions requires a lot of money while not all casino is able to spend that much money but there is always a way to lure players with lower promotions budget.
Of course it should be unique, it should be attractive, and it is not an easy task to do obviously
Creativity from the marketing team is needed to make a way of spending less budget but effective to attract players.
Spending money for marketing purely from their business pocket is painful and unsustainable and if they have to spend money like this, it's not easy to accept and their marketing programs won't last too long.
To make a marketing program long lasting and sustainable, it must bring benefit to the business, in income, revenue that will be used by the team for reallocation to the marketing program. If money flow is not recycled this way, any marketing attempt will be very short term. It happens with many casinos in the past, as they only want to try 2 weeks, 1 month campaign and all those campaigns ended and never resumed.