The casino is a company, and to build a company should have management and figuring assets by professionals. That is bad management if the Company goes bankrupt after a player won a big cash, what employer did? and is the operator sleeping?, Damn, I never hear that a new company/casino goes to bankrupt after a player won, I often hear about a new casino with bad management stealing customer money. So if you want to build a casino, you should have prepared 2 points; big capital and good human Resources management.
Every organization needs to have a risk management team. This risk manager should be in a position to inform the casino of the limit of the risk they can handle. A good risk management team would always advise the casino on how to avoid taking risks that will affect the business negatively. Any casino that risks more than its capacity to carry or bear will definitely have bankruptcy issues. If they don't have the finance to employ a risk management team there are corporate bodies that offer such services, so they can employ these firms to carry out periodic risk management evaluations.
Yes, the gambling platforms have more other businesses connected to them. In one day way or the other the platforms generate revenue which makes settlement easier and never get into bankruptcy. Some small casinos may suffer the problem of going down in business due to settlement of big wins. Most of the online casinos used to start little by little and progress good in the business. Such large win settlement will surely cause some drag down in the progress towards the next level of growth and business generated.
I am not a fan of relying on other sources of revenue to finance a casino. The casino should have a separate capital base different from other businesses own by the owners or the management. To make the management of the casino easy and less complex the business should have it's independent funding. What will happen when the business connected to the casino experience losses? I have never had any bad experiences due to casino bankruptcy. It might be because I prefer using reputable betting companies.