I believe that any company is essentially a paperclip optimizer that will do whatever it takes to win over competition.
AI companies have access to the IP of millions of AI researchers and AI startups who are in direct competition with them. If they can use this data to squash competition (either competition from the same researchers or from others), I believe that they will use it eventually (if not already), even if they say they won't.
They don't have to blatantly steal it - they can just train on it, or pass "suspicous" chats to human inspectors who might eventually be "inspired" by it in their own research. We saw the first (?) hint of this during the brief Fable release, with Anthropic declaring that they will downgrade model responses regarding "frontier AI" (i.e. anything that competes with them).
From other domains, we know for example that Uber used users' ride data to stiffle competition and regulation. There should be no reason to believe that Bigco AI companies won't do the same.
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If you type something into the internet now, or anything internet-connected that goes to a cloud service, it's safe to assume it'll end up in a training set, or otherwise mined for every last scrap of value, unless explicitly stated otherwise (and even then, it still might).Adjust your behavior accordingly, if that's even an option for you anymore.
For most, it's not an option. Only 5% of adults don't own a smartphone, and there's very little you can do on one which doesn't feed the machine. RMS warned us this day would come, and now it's here. We've worked hard for this world, hopefully at least our masters will enjoy it.
Side note: It's partially because of this that if I type something into the internet now, I feel no obligation to not type the craziest and most schizoidal thing that comes to mind (this comment here is a rare exception). Might as well, since most of your audience is bots.
I wouldn't even limit it to "AI research". They are looking to expand into other areas (see: OpenAI's superapp ambitions), and they will take your other business ideas, research, and code too. If they get caught they will blame it on the AI and lawyer up with more dollars than you.
I think you might be underselling the scope of the problem, and I don't think it's going to be fixed by some person deciding not to call the LLM today.