First, if you’re using frontier models through the API or a pro subscription, you have significantly more control than most people realize. Your data generally isn’t feeding back into training. You’re using the model as a tool, not handing over your content to a platform. That’s a meaningfully different relationship than the one you have with social media companies, where you’re feeding them data, and their business model is based on monetizing that data.
This is only true if, and only if, you actually believe Sam Altman* is telling the truth and won't change his mind in the future. If you don't think you can win a a lawsuit against OpenAI, and I mean actually win it, not just be correct about them violating their contract with you, then this particular argument does not hold for you.
*or Dario Amodei, but they're cut from the same cloth