Dependency among gamblers is an extremely powerful motivator. And the one who yesterday wanted to say Stop and take a break from the gambler will not be able to do this, because he learned that his friend won. And when the latter buys something for himself with the money he won, the first gambler will get angry and will feel a sharp sense of injustice. Although a smart person will not get angry, the thing is all just chance.

Also, rumors about winnings are a powerful advertisement for gambling among people.