Do they make more profit than digital banks, CEX exchanges, etc.?
I like to believe that top casinos do, compared to CEX exchanges where they get commissions on fees, the casinos are beating players and high rollers and they yield millions, see the comparison of the number of exchanges compared to the number of casinos.
Entrepreneurs know where they are going to put their money and it's where people are intentionally putting all their money at risk which is the casinos, the figures online can't lie, the online gambling industry is a multi-billion industry and it keeps growing by profit and by users.
I think casinos works the same? Because if there are losers, there will also be winners and maybe the only way for the casinos to earn a profit is through house edge. The percent of it can vary depending on the games. There are also lots of exchanges because cryptos popularity are still continuously growing but maybe it's only easy to create a casino and it can run immediately even without a license.
Even though a casino is known to be a profitable business and many entrepreneurs ventures it, many are also/still unlucky. There are still lots of services where people can avail and they are also being ventured by the entrepreneurs.