Yes, the fault of the fraudster is always primary, but sometimes the victim can also be blamed (if we return to the discussion, this will be a casino). If the casino has not provided reliable protection against scammers, then honest users may also suffer as a result of the actions of scammers. I think it is obvious that the casino has an obligation to ensure security, and if it did not do this at the required level, then it is their fault (although it is different from the fault of scammers).
If we are to take a glance at the possible causes to bonus abuse we could see that the gambler are th ones involved here because everyone want to participate in getting bonus but not only that but to have almost everything in their disposal, which is a display of greediness by most gamblers, you wish to get something free but try to deny others acceess to enjoying same thing, at the end of it all, the casinos seems to go under been hacked and the site ended up malfunctioning, these are the ordinary mistakes that could have been corrected by us right from on set but we got ourselves exposed to affect others through greediness from enjoying the bonus services front the casino