I don`t know, i never interested in it. I don`t recommend anybody to buy or sell accounts, but if someone wants to stop gambling - it may be a good decision for him - he break his past with selling it.
I don`t believe that it can help, but may be someone need something like symbol that there is no way to his old habits.
I do not recommend it as well and I don't believe that it helps with stopping gambling addiction. I believe that quitting gambling addiction is complex and it doesn't end automatically if the individual sells their account. A gambler may have multiple accounts and the wait period for selling them off may cause the person to go back into it. Self exclusion for a period of time or better still asking the casino to completely close down the account is better than selling it off. And if the gambling addict wants a long term solution, I recommend seeing a therapist that will assist them in identifying and dealing with the so the underly causes.