Some casino offer lower wagering requirements because they have less bonus amount. Also they backed it with limited max win and other restrictions to minimize the potential abused on their bonus.
Casino that typically have higher wagering requirements have higher bonus amount given to players.
Although there’s som casino that has no wager requirements at all but the bonus is limited to use on specific games only that has low hit ratio.
They have to find equilibrium between their business cost and benefit as well as their customer benefit. They can run marketing programs but they must have detailed plans on spent fund as well as what they will potentially receive back. Additionally, they must avoid overspending or inefficient programs which are harmful for their business finance in long term.
How much money to spend and what terms of a program are will help them managing it better as well as avoid fund loss due to cheating or too easy rule to win and claim bonus.
I agree on your approach to justify casino spending on promotion. It’s that casino needs to balance everything to make sure that their promotion will not hurt them financially while at the same time still attract players to play.
There’s some cases in the past that new casino encounters financial difficulties after some users abused their bonus that doesn’t have high wagering requirements but rewards a good amount.
I believe and agree that it needs to be balance.