I think sports betting can be found everywhere including an elementary school.
Yeah, as long as there is a sport
(s) where everyone bets, as long as the bettors agreed all the conditions, then it should go. Even it's not about money as long its considered as a bet then it will be.
Criminals are supposed to change their lives inside for them to have at least a second chance to live a better life outside but they are even falling for gambling, drugs, and alcohol addiction. The government can't do anything to stop it because there are also officials that are involved in these activities in the name of money.
Depends on the countries, if there's a country allow to gamble, gambling isn't considered as a illegal activity and vice versa. Government can do anything since they have a whole power to control their country, but they want to get money from illegal gambling that's why they just close their eyes.
This was such case in my country in the last few years where casinos, drug laboratory are discovered inside prisons, and probably got destroyed by the past admin. I don't know if it's still there or a new one is made
(possibility are higher though) since the current admin is not that inflexible for crimes unlike the past admin.