Seems clear now, not just this one, if you read more posts above, you will find the same problem from a newbie.
As I see it, 8bet is one of the gambling sites which makes it easy for the newbie to create an account and farm. Even though they have tightened up the system by tightening withdrawal requirements, but still many cheaters slip off, which means no matter how strict the system if loose supervision that could be easy to penetrate cheaters.
Yes, they posted free spins code almost every day and I think not many new people aware about it so high likely old users tried to take an advantage by creating multiple accounts to claim the free spins code. It is not a new thing in this gambling industry, where there is a chance to make some free money then there will be effort of abuses. In above case, 8bet give the chance for the player to take the winning but deposit is required. Now I think it is better if there is a better terms and conditions for the free spins code to minimize the number of abuse.