And trusted casinos already have clear TOS so that each member must read them so they don't break the rules.
The question raised is whether all gamblers who sign up with a particular gambling site read the TOS. It is true that only a few of us actually take the time to read the TOS. Typically, those who do read the TOS are likely gamblers who are planning to wager significant amounts of money or individuals who prioritize understanding the terms and conditions of their engagement. However, for many typical gamblers who do not bet substantial amounts, the common practice is to simply click through, move to the next step, and agree without thoroughly reviewing the TOS.
You said it right, when you are planning to stay and use a decent amount of money especially when participating with some promotions that the house are offering, you will be needed to be equipt by knowledge about any rules in order for you to earn or to receive the offer, users and agreement is always your key to learn more about the offers and for you to have a backup evidence in case something bad or something happened when you are ready to cash out your money.
Always take time and always make sure that you are using casinos who already gained trust and have that good support whenever you need details about the promotions.