Training data is almost certainly their main reason for this acquisition. Users themselves and the models they use don't really matter. What matters is their interactions with the models. Especially if you're trying to build coding agents that will be marketed to companies for $10k a month. OpenAI is going for the industry B2B opportunity here, not consumers or end users.
They only get the preprocesses stuff that is sent to their api. But if you want to do complex coding tasks, you need the whole user interaction with the project and not just bits and pieces.
