Never heard that casino share same game provider? You will most likely caught if you this and confiscate all your profit when you withdraw since the provider itself will report you to the casino. Provider track arbitrage bets even if the bets made from different casino as long your bets is always sync to each other.

This is the common method of those user that always complaining about confiscating their profit after winning an insane amount since they are not afraid of losing when the other account is winning in addition to bonus from casino.