If their main goal in gambling is to seek profit, they may difficult to win much money because gambling is not like a job which can gives you an income. You can realize that if you decide to continue playing gambling, you could lost all of your winning without you can withdraw the money. You make the best decision for you to stops yourself from gambling.
I myself, if the goal is to seek profit, maybe what I do is continue the gambling session by increasing the bet amount or sticking to the previous bet amount and waiting for luck to happen. But what I think is that luck will not come every time so what I do is withdraw the profits that have been obtained.