In my opinion, this kind of offer should make the high roller think about why he is being made such a tempting offer. At the very least I would immediately suspect that the casino making such an offer is obviously going to empty my pockets. I guess I will never understand what such people think, because I can not afford to bet more than $5, and I use such bets very rarely.
But you initially know that any casino is trying to empty your pockets. And judging by the reasoning about the amount that you can afford as a bet, you still visit the casino (or play online). So what's the difference? You can afford to lose a small amount of money, and for high rollers, this small amount of money is several orders of magnitude larger. They don't care where to spend, but naturally when they get generous bonuses somewhere, they go there.
That is why we really need strong self-control in playing gambling because the casino will always provide offers that will make us tempted to follow it.
If we don't have self-control, we will surely take their offer and play until we eventually lose track of time.
If we can't afford to bet more than $5 or some other amount, then we really need to be able to control ourselves not to be tempted by their offer.
And if we see that their offer can make us spend more money, then it is better to leave the casino immediately before it is too late to know.