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You`re right about new casinos. They try to get new gamblers with all kinds of rewards and it can be a good choice for bonus hunters, but the same time new casinos can be a scam. For gamblers, that wants just to gamble - old casinos with good reputation can be the better choice due to their account bounty program. For gamblers that want to play for a long time it can be better decision.
Anyway, we can`t change the casino politics, we can just choose the casino we like most than others.
I think that in the near future, the policies of casinos with respect to bonuses may be more similar to those of brokers, who only use bonus money as a leverage for operations, if and only if the person decides to use it, otherwise I think that is not possible. If the new casinos begin to implement this type of policy, it may be that they will do much better than many do when they start, with that they save the problem of vulnerabilities, and obviously the casino bonus is "No Withdrawal" nor with wager requirements or something similar, and that is decreased each time you leave without making withdrawals.
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New casinos that really wants to grow very fast need to adoption different method of complimenting their customers which will make some gamblers attract more friends and people that will love to try a new casino that has a good rewarding system for new and old users.
This time around some gamblers that have had really bad experience with new casinos that scam them will not want to use a casino without seeing how far they have been in existence and how good there reputable had been. All these are ways that keeps some casinos stay static and never grow as fast as possible.
They can use referral system and bonuses for account for long time gambling. And some gamblers can get good profit from inviting gamblers. The same time the casino get new gamblers. Such system ought to be more profitable than in other casino to attract new gamblers. And of course, such new casinos have to work hard with bugs and support gamblers to get positive feedback.
What happens is that everything sounds very good, but we have to take into account that there are many people who are in charge and handle the issue of referrals very well, and this is something that can be very delicate, because I have seen in systems that apply and they let referrals stay that they always refer so that they can count as such, it is that they enter, deposit and play a minimum so that they can have interaction and be valid, for the rest I think it does not apply, this is something that should be taken into account It is a concern and therefore I see it as something to be careful about, because it can involve a lot of work and a minimal failure and the benefit will not be given.
The bonus and referral system always changes and the security makes some proposal how to change it, to make it more stable and to decrease cheaters opportunities.
I can agree that the referral system is a serious problem to the casino due to multiply accounts and to situations when the referrer just withdraw his referral bonus. Possible, that it will change soon, at least this system needs some restrictions.
And the bonus system is the instrument to promote the casino. For the gamblers it gives a chance to test the casino without spending money. It brings much more profit to the casino when cheaters can get i think.