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In the first list , United States and china are not listed in the gambling ranking which in the 2nd graph, these two countries top the list.
How could there could be so much contradiction in the both reports and which one is the right one ? It obvious one of these report has to be wrong one.
Contradiction comes from their sources probably! I don't even know how they can do the math these days, except legal gambling sites and casinos you have illegal ones, and we have crypto gambling! To gather accurate information from all of them is impossible!
Therefore, these stats are just for legal fiat casinos! We can only speculate how big crypto gambling is, and how many illegal gambling activities there are across the world, I doubt that anyone can provide accurate info about that.