If self control doesn't work, money control will be impressive. I agree with you. I often can't control myself when gambling, so I set a budget and control it. Another strategy is time control. Determining in advance how much time you will gamble can reduce the amount of money you lose. This also often doesn't work this method if you have enough money in your wallet. Self control and money control are the best methods.
Yes, I also agree to the fact that using "Time Control" measures may not be the most suitable for reducing how much a gambler spend while gambling, because depending on how much that user is wagering per game, he/she can spend more or less within a certain interval timeframe. Hence, amount control is the most suitable strategy a gambler could use in regulating how much he/she spend on gambling, whereby you deposit only the exact amount you are willing to exhaust at a time and you continue gambling until it gets finished. Because in most scenario, when a user try to gamble for a certain time interval, they may forget and gets carried away, depending on how addictive the game is,