yes you can stop from gambling without money involved and those gamblers are usually play for the sake of fun/entertainment but for the gambler that plays for profit , he will also stop once he reache his targeted amount but he can also stop once he dont have a bankroll to play with.
Did you just disagree first and agree after? lol, I'm lost.
If someone is playing just for entertainment and yet he have a certain amount of money which his target before stop playing gambling for a day or for a certain period amount of time, then it's just the same, he won't stop until he met his quota for the day, and this support the statement that he won't stop if he keep on winning by what you've said lastly
in case of winning the jackpot , its not guarantee that some gamblers will stop but they tend to play more because they think that they are lucky and they have now alot of capital to play with .
This is what I mean, this jackpot is a game changer even if the chances of winning this is small, we still have to consider this thing to happen to any gamblers.