Some closes some do not. Most reopens just with another name.
recently there was a very old and reputable casino here on the forum that became a scam, it took many days for people to accept that the casino had become a scam, as the casino had been operating for years and did not have many serious problems although it had some accusations in the past so people trusted this casino, until the casino went into maintenance mode, the casino representative in this forum did not communicate anything, he just remained silent until the days went by and by, and of course people were still optimistic that the casino will come back, it was just maintenance
then the representative says that there is a problem that he is solving but that it will come back soon, fact is that the casino disappeared with people's money, unbelievable but it happened and it is assumed that they have another casino, even though I have not seen any proof of this, me I dare say that these guys don't have just one casino, they have many casinos, and a network of scammers, so when one casino disappears the other casino remains functioning normally and they keep more and more profits with this scheme
looking at this casino's scam case it reminded me of the years 2013 when ptc (paid to click) sites were very popular and many scammers were creating many ptc sites and all the time paypal had to resolve disputes with the ptc sites vs yours dissatisfied customers until paypal stopped supporting ptc sites, in the case of casinos they are free because they accept cryptocurrencies as a payment method, so it is easier for a scammer there are many casinos
So unfortunate turn of events. I'm guessing their number of clients have declined most probably? or are there numerous accusations and issues they're facing, that they can't afford to focus their time into it. A scam casino is always going to be a scam casino eventually, because that is the original plan regardless if it looks like it's legitimate and paying at the first few months of it's operation. So, that casino you're referring to has always been a scam. Legitimate casinos don't just run away, they resolve problems otherwise they will offer reimbursements or refunds when they are facing financial challenges or if the system is compromised.
This also reminds me of the local gambling place who pools people bets for one big lucky winner here in my region. After they accumulated large amount of money, they just ran away and never come back.