Since some bonuses cannot be applied to accounts that have been created already and in use, you most likely cannot get the bonuses on them and so I think it's a reason some gamblers would want a second account on the platform but then some casinos do not permit such and so they actually could try restricting or deleting their other account so they can actually get to start the new account and fund it so they can be able to enjoy such bonuses.
Usually they will restrict such accounts. Then the same person will come to this forum to raise a scam accusation about the casino holding their money and now allowing withdrawals.
There you see the two sides of the story, the casinos try to be accommodating of most players but people have to become over-smart and try to defraud the casino using more than one account which is why I suggested the OP to stop doing it. Be honest and nothing bad will happen on the casino but try to cheat you will be punished.