His face will show you that he doesn't understand your tactics yet, but you don't notice that he is slowly eating the large amount that you won from them. Then there should be a lot of money with that kind of technique. Because if you want to last long in the game, your gambling fund must also be long.
I haven't try it yet, but I have my own strategy when it comes to betting and just like other gamblers, It may work on me but don't work to others. If you already see it as an effective way, meaning it gives you help to win but in the long run, you have to add or improve that method and insert your own strategy so in that way, you know what are your next steps to be able to win again.