I was just as surprised as you guys since I did expect other countries to show up here as well instead of the ones that already did but you can recheck the same on the source : https://www.google.com/amp/s/www.worldatlas.com/amp/articles/countries-that-gamble-the-most.html
Other than that US , Canada,. Japan , UK are few of the countries known for their absolute support of the crypto casinos as well.
What about your country as well ??
I don't know why Philippines isn't included in the list but it was understandable as our country doesn't really do online / crypto gambling but are more fond of local gambling such as Cockfighting, Horseracing, Lotto, and there's even a cost-friendly casinos called "Perya" (in which I already assure you have more audiences than high costing casinos) Our country even endorses Off-shore gambling companies hence a country where some online casino resides. As also mentioned by joeperry, the houseedge of casinos in here really is low or we might just been living our decades having families that made gambling their daily routines
Most gambling platform here in the Philippines is just a large company of casinos and of course only in the high class can afford that instead we have for the middle class and lower which is the stated by Maus0728 they are popular in the Philippines most the Online sabong or online cockfight some of the medium is using with the cryptocurrency for making transactions, the managers are the one who responsible to make a cashout if they want and of course the large number of participants the large referral for the invitee to this is just one to earn in that online cockfight too. That's why this is one of the trends in the PH not only enjoying but also can earn through referral too.
anomalies, the Philippine government is making a huge profit from the taxes of this online sabong I don't know the exact figures but with it being a controversial form of gambling here in the Philippines, I will not wonder if the Philippines will reach the top spot in the futures, because the government doesn't want it stopped because of the huge profit they are bringing to the government when they needed it most.