A casino site cannot run for long without funds, especially if it lacks sufficient liquidity. Then there is a possibility that their business will close soon, because any player can win a big amount; then, how will they pay if the casino site does not have a large amount of money.
I saw some new casino sites launch with large amounts of funding. Because they need to run numerous promotional bonuses and campaigns, it is not possible to establish a casino site without a good amount of funds. Many sites have shut down due to a funding crisis. So I think liquidity is very important for a casino platform.
Which company in there right senses will even do that? There is an old thread about a casino in this forum, they launched a casino, everything went well and the first 2 weeks of the casino, people made more than what the casino will be able to pay, instead of the team to look for a way to pay back users, they ran away. It was later they found out the casino does not have money to pay back players and as useless as the casino looks, they offered bonuses to new users to test, maybe it was part of the plan to run draw them closer.
The casino does not make money on their first launched, they most likely run on some losses but with time and adverts, they make more people to use their casino and they lose.

The more those people lose money, the more they make more money and that's why the don't stop advertising from popular places. This forum is one of the big places these casino makes money.