> I don't have a clear idea how that value can be captured, since it's going to be 90% AI generated code that anyone can scrape (public projects) or can't be used (private projects), so perhaps you're right.

The value is probably in knowing which AI-generated code ends up being pushed or discarded, which can't be derived from public projects. This information can then be used to finetune the next big model so it only generates the "good" code.