Self exclusions and other similar features will be entirely be that totally useless if someone doesnt made up his mind on quitting or having a break on doing gambling. Just like been said that these are all useless if someone doesnt have that fixate its mind on completely stopping gambling on which it will be that totally having no use and thats why self control will be that much needed when you are that wanting to quit gambling or having a break then it will be that depending entirely with you as a gambler.
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That's also true that doing gambling or taking break from the gambling all depends on that person minds.
If he has truly decided that he will gamble responsibly, then he does not need to use all those features like the self-exclusion to the Temporary account suspension etc. Only by gambling with a specific plan can he gamble responsibly; otherwise, if he gambles for greed, then his chances of gambling responsibly are very low.In those cases, even if he uses all those features, it becomes difficult for him to gamble responsibly.
However, in some cases, those features can help, such as if you have invested your entire budget for gambling in a platform and use the temporary self-exclusion features there, then there is a possibility that you will be prevented from gambling due to your money being tied up.