Well, for an addicted gambler, the fact that they recognize the problem and realize that they should stop and seek help is already an achievement. I don't know if there are statistics on how many gamblers manage to solve their addiction problem, but I think it's a small percentage of the total number of addicted gamblers.
We have a forum member who was addicted, now is cured or in a process of recovering, and who has changed his attitude to gambling (he is still gambling, but without much passion or addiction as he used to have). You can read
his topic or we can ask him how he has managed to achieve such a result. That is a rare case of success and return to gambling. From other stories I have seen, those rare who recover, are afraid of gambling like its fire.