In my personal view, talking about someone who is successful in gambling "is not about how much a person can win a bet" but rather talks "about how a person can control himself over the gambling activities he has been doing so far" which is where he is no longer influenced and provoked by the environment or by an offer that might make him do something stupid again when gambling.
Someone who is successful in gambling will never assume that gambling is a money-making machine that can give him profits. and someone who is successful in gambling will never prioritize his gambling activities compared to the responsibilities he is currently carrying out.
The successful gambler will not get addicted to the gambling sites,because he know the gambling is the game.Only the people who don’t know the gambling is the game will start to do the gambling like the money making machine.The fact is the person who think the gambling as the money making machine will always loss the money and the game.Because he do the gambling without the knowledge,he also do the high bet gambling as compared to the gambler was successful in nature.The addicted gambler will do the gambling by taking the loan from their friends to do the gambling which is not a good one.