With the Pakistan govenment having laws in place that restrict gambling it spills over into it being illegal to own, operate or attend any on land casino. This may be one of the reasons why so many Pakistani residents who do play on line have chosen to do this.
Many of those who play online in Pakistan will access casino sites that are legal in the UK. Some of those sites will not allow Brazilian players because of the laws of their country regarding gambling. This may reduce the number of choices there are for online casino play with le gal entities.