That's how casino counter the martingale strategy. Most of the bankroll won't keep up if they experience 20x losing streak. You need to have a ridiculous amount of capital to keep up with a very small base bet if you experience that kind of losing streak. This is why I don't do martingale only strategy on a casino since I've lost so much money just by doing it. It's an effective strategy but the risk of it will certainly drain all your bank rolls. I suggest to just use different strategies when you are doing a gambling session or mix some strategies.
I disagree with your point. Casino's don't need to counter martingale strategy, nor it's effective. It's mathematically proven to be not a good strategy by any means. It's based on gambler's fallacy and human's inability to understand probability or big numbers.
People can say that they understand how probability works, but we are intuitively wired to not grasp it. So we want to use it as we see more meaning into it. It's just as effective as any other method. All based on luck and probability
I think that a casino with a particular game, whatever the strategy, the casino will always have the advantage, that is something that cannot be denied, however, if a player uses the martingale it is a very reckless strategy, I do not recommend it Under no circumstances, because things can get ugly when it comes to playing like this, you can also win, but I think that the risk is not worth it, even when another type of strategy is applied, because the chances of winning are the same for a player As I have said, the advantage of the casino is always Evident.