Probably a small number of people can boast of being able to walk away from a casino with a winnings, and there are many more stories of failure. Risking your last remaining money is not a smart thing to do. I don't think such people have any strategy or plan of action for sure. It's just a huge success that happens very rarely, maybe even once in a lifetime.
True, it doesn't usually happen. It is totally on luck. However, it is not unusual to win small amounts of money here. As happened to Smith. But he gambled with $5,000 for about a week and won $17,000. This amount is not very high in gambling where many people have records of winning millions of dollars with keeping very few dollars.
From 5000$ to 17,000$ I consider an impressive achievement already. It's not everyday gamblers manage to grow their bankroll above x3 with success. In unlucky days it's not possible to make a slight 5%-10% profit due to constant losses. Therefore gamblers shouldn't neglect x3 winnings. It's the perfect time to stop and to use this money smartly, growing it through another methods without involving gambling anymore until they have increased their income, so they can continue using part of it for gambling activity as hobby, but keeping in mind the lightning is unlikely to strike twice!