If a casino takes money from you, they let you stay. If you take money from them, they throw you out. They don't want competition. amirite?

Either way they want you to stay longer, especially the winners. Over the long term they will win. Even if it means "comping" you rooms and meals.

Did you think they did? They want money. Your money more specifically. Not to offer a fair gambling opportunity

You don't get kicked out for winning lol