It's not really any different that stopping selling counterfeit goods on a platform. Which is a challenge, but hardly insurmountable and the pay off from AI videos won't be nearly so good. You can make a few thousand a day selling knock offs to a small amount of people and get reliably paid within 72 hours. To make the same off of "content" you would have to get millions of views and the pay out timeframe is weeks if not months. Youtube doesn't pay you out unless you are verified, so ban people posting AI and not disclosing it and the well will run dry quickly.