...If you go to some gambling shops here in my local when big win happens before you cashout even when you want to keep it silent some of the shop managers always in one way or the other raise alarm of such winning by doing so they drag unnecessary attention to the player who just win I don't know if it's a way of telling others that big winnings happen here and you too can do it, but it's a very insecure move.
Of course, they want everyone to know that a jackpot has been won in their institution and this should attract additional attention to such an institution. And this is at odds with the desire of those who have won a significant amount of money and do not want to attract attention to themselves, because they may become the object of robbery or extortion.