i never said it is a good idea to martingale..

i am saying that why is there a limit ? why ? because if a player bets 50000 coins and won and he would never come back again, and so the casino is fucked .
how to avoid that ? how to make the user play more and lose because of house edge ? LIMIT THE BET ,so simple.
Fine then, we both agree that it is not a good idea to use martingale. The max profit is set based on the site bankroll and on Kelly formula, and yup it is there to reduce risk to the house. But as I said in my first reply to your post, it is not targeted specifically to martingale gamblers and indeed there is no need for the house to do something to "counter martingale".