What happens at one book, doesn't carry over to another book. Most people don't even know books that have the same provider. Unless the player was notified that he is banned at all Betby books, pay him. The player made two live tennis bets. There is no abuse. He didn't know he was banned at Duckdice. A lot of times a point can be made for both sides. Here there is no reason for the player not to be paid.