If a casino breaks their Terms of Service, it is not good but a trusted casino does not do that. If we as customers, don't read Terms and try to exploit their Terms, when casino pull their hammer, we don't have right to say anything as innocent victims.
There might be some casinos who update their terms without notifying the players but the hidden aim of them can be to fool players but legit casinos make players aware about any change and it's also our responsibility to check them before playing and with time also but yes normal playing won't land you into these withdrawal issues.
It's obvious if a casino has motives for unprofessional way like this like implementing a new rule that is widely used or doing by gamblers. One example of this is countries that they ban, all players on that country will be affected immedietly if the casino didn't announce their terms being change in advance. Though most legit casino won't do this since it's unethical. This is why it is important to choose what casino you are playing and make sure that the casino has the reputation that they are protecting for.
I believe casino loves to cater every country as much as possible but the country's restriction of gambling should prevail to avoid undesired legal consequences. Casino restrict a country for both the platform and players safety from the undesired legal actions. So I do not think a casino will just restrict a country because they wanted to cheat a player. If there is an amendments on the restriction of countries, it will be announced or published several days before the amendments take effect so that players will have an ample time to withdraw their funds.
It is not about Rollbit that is big enough, trusted enough.
We all know about Rollbit and they are trusted casino in the market doing legit operations from a long time which has managed them to gain reputation in the market among players but he was talking about some other casinos which try to fool the players with rules manipulation and yes there are some of them in market.
Rollbit had been in the gambling industry for some time now and their reputation are growing each day. Although there had been some hiccups, but the casino is taking care of them and continuously doing their best to solve the cases justly.