The casino has done many promotions to attract more gamblers so that the casino can get more profits. Casinos can only motivate gamblers by providing more attractive promos with big bonuses and trusted casinos have done that for a long time.
These promotions and bonuses are means for a casino to entice and make those who are hesitant to gamble decide easily. Without promotions there is no reason for a hesitant gambler to play at a casino since the argument between to engage or not to engage is somehow balanced. But promotions and bonus offers somehow outweigh the hessitation of a gambler to engage in the gambling industry and as an end result, the hesitant gambler feels the reason to engage in gambling activity because his money will be doubled and at a later time can even get more due to Rakebacks and cashback.
Chatbox is a means to attract gamblers to stay online because they can discuss anything or just chat. And in fact, we often see people deliberately giving crypto rain bonuses to gamblers actively chatting in the chatbox.
Aside from online intereaction with other gamblers, the chatbox is also used by the casino to give airdropds like rains and code drops. This will entice the bystanders to participate in the conversation and enable them to engage in gambling activities without spending money from their pockets. This kind of situation can be the start of a journey of a hesitant gambler to his gambling venture.