It's definitely a great way to earn in terms of not gambling anything. Promoting in a way is indirect but still has the influence towards other people to gamble. It's less in terms of exposure but still affects the people who might be influenced by it. I was confused at first with this but it's like how the signature campaign works here, you are promoting gambling but not actually gambling itself. It's a way to refer to the casino and marketing it is quite okay with it.
For the VIP programs, I don't think it can be considered because you still have to bet in order to achieve that level. It's quite 50/50 for me.
As long as you can refer the recommended casino, you can expect to have some people join under you. But we know that promoting casino and other business need time to get the good result but sometime that will happen for some time. We must be ready with that so we can use the other strategy to promote the casino.
But it is better if they can get another job that different than gambling. That is for enjoy your daily activities without thinks about if the casino can not pay their members. Reaching VIP level needs time so you don't have to focus to grow your rank because you need to spend more money to lift it up.