Changing of terms and conditions without notifying the users or gamblers is normal with online gambling websites? Then when you did something wrong or about to withdraw your money they will tell you that you don't read their terms and conditions, and you start arguing with them until you decide to read the ToS again and you find out that it's different.
Gambling websites reserve the right to change their terms and conditions at any time but must notify all their customers on their behalf. Otherwise, they must act outside the rules. This will make them suspect that they are not really being honest with any gambler. If anyone conducts their gambling on a fake or scam site then they are responsible for it and they are sure to lose their money. So before gambling must choose a good site otherwise one may get scammed.
A really sudden change in the rules of a casino, if it is not caused, of course, by force majeure circumstances, should always be perceived by the players of this casino with caution and should be taken as a signal in order to understand the reasons for such changes.
I believe that serious large casinos should always notify their users of changes to the ToS in advance and with justification for the reasons for such changes.
Another good reason, of course, is the requirements of the changed local legislation, which the casino cannot but take into account in its work. But in this case, the notification is made in advance in a planned manner. And the entry into force of the amended rules for using the casino takes place from some predetermined date.
So, if a casino suddenly and insufficiently reasonably changes the rules for using their casino, this should always be suspicious.