Each casino has its unique bankrolls and other things so casinos are not the same and gamblers can not apply their one strategy without modifications for all casinos for similar games.
It's like trading, each exchange has different trading volume and gap between buy and sell walls so that with same capital, a trader will have different impacts on price as well as their entries and exits. Generally, people like exchanges with high trading volume because they want to get as less effects on their entries and exits as possible.
Similar for casinos, they will more prefer to choose big casinos with good reputation and good budgets to pay users even big wins. They don't have to worry that when they win big, a casino will run away or pull KYC card or something against user just to avoid paying out.
Liquidity is very important for casinos. After all, the more players there are in the casino, the higher the jackpot and the more opportunities for earning. That is why players are attracted to large casinos.
do not underestimate this because there are many gambling sites that become scams when they are unable to fulfill the requests of users who make withdrawals, this is caused by these gambling sites having problematic liquidity (not large and stable)
every online gambling business developer must think about this because even a small mistake (failure to fulfill the request of a user making a withdrawal) can destroy the reputation of their site. coinplay developers are surely very careful with liquidity problems.