Monty was fully aware that dual licensing model leads to vendor lock-in for the customers relying on the proprietary version of MySQL. It also mandated copyright assignments which directly resulted in MySQL never becoming a community oriented project. Crying foul about it now is certainly self serving. I don't think I have much sympathy for that. I am not buying the claim that MySQL cannot be self sustaining or profitable based on support/services instead of dual licensing either. I would also note that Monty's business now around MariaDB is not based on dual licensing.