The amount of money that was involved should be enough reason to prove to you that it wasn't a form of promotion and it wasn't a deliberate act by the casino, there are other better ways to do promotions of the company is trying to get more customers they can even decide to double the despite of customers just to intise them to rush to the casino but the amount involved in this particular case is too much but the casino has to pay up to attract more customers and to gain more trust and popularity from others who must have gotten the information as it was spreading across all over the media.
Come to think of it. You are right. In as much as casino can spend any amount for advert but 3M on advert should be on a promotion that will last for a couple of months not few days. It was obviously a bug issue that led to users, manipulating the system for their favor. Well, it is a good thing, the team where able to draw a conclusion and sent all payment. Now many gamblers are aware of their platform and in terms of reputation within the country, they will be ranked first because of one bright honest moment.