Casinos don't profit from how much you bet, they profit from how much you lose.
And if you lose that bet you've made then it means that it's still profit for them.
Therefore, I can say that their greatest interest is for you to lose. But first, they'll let you have that taste of victory, because that way, with confidence, you'll bet more money.
That's the normal thing in gambling. I think even in gambling places like Las Vegas, you'd really taste the sweet victory in the beginning and they'll allow that. And once you're hooked and losing a lot of money in them, you'll have hard time in getting out of it. But if it's the opposite, and they've noticed that you're winning significant amount of money, you'll be stopped and might even get banned
to enter their premises.