I don't know you came about checking the ratio of your supposed stats but I do also feel some how when their is an increase in the bank roll of the gambler the risk involved is alot lesser per say the number of game accumulated will be reduced and the risk also will not be too much.
Poor people mostly lose because poor people are afraid to take the second risk and they don't have money to take a second risk or invest. There can be many other reasons such as those who are a little poorer mostly withdraw funds or withdraw portions of the profit and those who are rich keep the portion of the profit. As a result, the success rate of the rich is much higher than that of the poor.
They just don't have the guts to take the risks, and they also don't have the means to take the risks. You see, there is a huge difference between rich gamblers and poor gamblers. Yes, we hear that mostly rich people win, but it is only on the front end. Look at the process of that win, and I'm sure there are a lot of losses before they achieve that win, or more or less, the losses are huge compared to the amount they win, while poor gamblers, or, let's say, middle-class gamblers, have only limited money to spend. Yes, they can borrow, but that is not a wise move by those poor gamblers. Also, rich people or rich gamblers tend to flex their winnings and hide their losses, just to say that they are lucky in terms of gambling, more like rich people thing. Anyway, in short, we can't compare rich and poor gambling.