The libertarian in me says people should be allowed to make their own choices but I can't negate that gambling in poor is overall significantly negative for society. Before India banned this kind of gambling, I had a firend who worked as a data scientist for Dream11, an online fatasy cricket like gambling app. He was able to see a lot about the people playing. Oftentimes, the daily 'ticket size' was somewhere around 100-300INR (about $1-3), these were folks earning maybe 1.5 to twice that at the most. Their kids were often going hungry so their parents could play.