I think those gamblers try to open double accounts in the hope of getting more bonuses. Most of the time, they bet regularly on one account but try to get those bonuses with other accounts. And these activities are prohibited for gamblers. Those who engage in such activities will not be able to benefit from gambling sites or they will be at risk of big losses. In addition, some gamblers who have such an intention, they do various illegal activities for a long time to cheat. However, those who gamble for the purpose of this cheating are detected in a short time. No gambling institution allows this kind of cheating.
Wait whattt? I don’t understand the point of betting regularly on one account while other account is claiming bonus because you can just use your wager on your regular account to complete the bonus requirements. Additionally, you can level up your VIP quickly with one account so that you can have higher rewards and benefits.
Multiple account typically committed when user tries to bypass the casino limits on bet amount or a ban player trying to play again on a casino.
Bonus nowadays is useless to claim on most new casino because of wagering requirements.
It is possible that what he meant was using the main account when gambling and using another multiple account to get bonuses such as free spins bonuses or others to be able to take advantage of more bonuses given by the casino, but I think that is indeed prohibited act and it is more profitable to just focus on one account and increase the VIP rank because that way the bonuses can be much more profitable.
Using multiple accounts if it is known by the casino team is still worrying thing because it can be suspected, some people say multiple accounts are to bypass casino restrictions or bans but we cannot know if that is really the main reason or not.