It does end well for any gambler who thinks they can easily multiply their gambling money won through gambling more. I don't feel pity for those kinda people who allowed their greed to control them to gamble consistently without thinking of "what if" I gamble, and it didn't work as planned to win more.
That being said, this is a lesson to learn for those who think they can actually bet to win more without having a rethink about their actions that gambling losses are more than wins
I think most people get into gambling exactly for that reason, to multiply their gambling money.
If it was just for the games, they would probably just play those free games instead.
In reality, those free games are not as addicting as the real deal when there's money involved.
Greed is one of the main drivers of addicted gamblers really.