Unless companies also donate money to sponsor the code review that will be required to be done by real human being I could see this idea being a problem for maintainers. Yes you have to code review a human being as well but a human being is capable of learning and carrying that learning forward and their next PR will be better, as well as being able to look at past PRs to evaluate whether the user is a troll/bad actor or someone who genuinely wants to assist with the project. An LLM won't learn and will always spit out valid _looking_ code.