People will not have the key successful in gambling because gambling is not for all people especially if they don't have good control over themselves.
In one line, there is no such thing as "successful" gambling. Gambling is a business for the casino and you expect yourself to win from them? You will always lose in the long term. Control to not gamble is the rather better outcome, if you dont gamble you dont lose money here. Ultimately the odds are against you.
They could only use gambling to have fun for some time and stop gambling before their money runs out so they can prevent the big lose.
If the games are limited to having fun or for killing some time with the spending of some money, it should be well and good.
The fact that people try to strategize a losing game by making up lines is ironical.