GPL is what allowed Monty to fork after selling the MySQL trademark and copyright to Oracle. So Monty lost the ability to dual license, yet gained much money. A

GPL is what allowed Monty to fork after selling the MySQL trademark and copyright to Oracle. So Monty lost the ability to dual license, yet gained much money. Arguably with GPL2 he could even fork with proprietary plugins created later. Or he may have negotiated a backroom deal with Oracle to keep some relicensing rights.