Gambling is not profiting in the long run. If someone has been gambling for long without a very bad record in terms of their winnings and there is a recent win, it will make the person happy, not because they have won back all the lost money but because the win will appear to be a ray of hope. Personally, I will feel happy about it; I don't know about others, as I don't like doing the maths between how much I have lost in gambling and the money I just won.