And if they already paid for a certain amount of ads? What if there is a contract and they are obligated to have their ads on the platform for a certain amount of time? There are any number of reasons why they can’t just pull the plug , no matter how much they may or may not want to.
You could feed all the research papers in the world to an LLM and it will still have zero understanding of what you trained it on. It will still make shit up, it can’t save the world.