First question, if I may ask how does this addiction work for few people, anytime I keep facing challenges with something I will prefer to quit, it's always best to quit before it's too late.
Second question, if this act has turned to an addiction then it's too late or rather the person is willing to change, the idea of getting busy with work can stop this act, a jobless person should find something doing and get busy with the work, in essence keep yourself and mind out from gambling and focus more on work. There's no solution to gambling addiction but I have seen people who escaped from such and each time I ask they'll always respond with build your mind, so I think the mind really play a big role in humans mostly the ability to resist an act.