It would be a waste if the government will pour too much resources just to track down these gamblers just to impose the the new rule/law, it would be an expensive mistake because as said above, there are way more problems that needs to be prioritized that are more harmful to the people and its government. Instead of prohibiting it from the use of public, the government should just take advantage of it by taking taxes. They cannot just hunt everybody down as these days, people are way more clever than the authorities and there's VPN that can be used.
The government cannot do anything in this concern. They might shut down that site in that country. But this will not be effective because at this stage people are very much efficient they can use same site by another name or use vpn. Rather if the government think of taxation or any other profitable thought that is better for them.