Good thing I'm not also fond of using my credit card every time I gamble. I don't like it's high transaction fees especially that it never guarantees me to win. So I always chose to pay in cash, an amount that I can easily afford to lose.
There are encouraging offers from the credit card companies like waiving their annual fees and I think when you're talking about transaction fees, normally it is because of the third party or what not. I don't use it and just like you I'm not fond of it maybe if I use a credit card then it should be for things like groceries and bills where I'll get more points rather than getting possibly tracking sanctioned by the credit card company if they ever seen that I've used it for gambling transactions.
However, for me it's not using credit card that actually fuels gambling addiction but it's always the attitude of the gambler itself. If he gambles without seeing a budget limit and just decide to gamble whenever he wants to, definitely he will really fall into gambling addiction.
I agree, that a gambler will always be a gambler, and no matter what drives him it's always his decision that makes him on the track to gamble more whatever payment method he uses.
And for those who gamble thinking that casinos are providing them source of living, then it's always possible that these gamblers will end up having gambling addiction.
That is for sure but there's also the reality that there are gamblers that are doing it for life and they're considered to be real life gamblers, may not be professional as the usual ones but just casually does it and while it is there, they just rely on it until it lasts.