I actually pre-emptively deleted ChatGPT and my account recently as I suspect that they're going to start aggressively putting ads and user tracking into the site and apps to build revenue. I also bet that if they do go through with putting ads into the app that daily user numbers will drop sharply - one of ChatGPT's biggest draws is its clean, no-nonsense UX. There are plenty of competitors that are as good as o1 so I have lots of choices to jump ship to.
And some of them will be from poisoned data, not just an explicit prompt by the site-owner. A whole new form of spam--excuse me--"AI Engine Optimization."