I'm going to take a while guess here and say this strategy is part of their plan to get even more access to more code to learn from.
If you can see entire version histories of how code is generated, what bugs occur, what fixes are made and how they're implemented, you have the entire human and machine coding feedback loop to learn from.
If you can see entire version histories of how code is generated, what bugs occur, what fixes are made and how they're implemented, you have the entire human and machine coding feedback loop to learn from.