I think this question is important because it gives the decision back to content creators, and that's where I think it should be, as a point of principle.
The alternative - and this is what I think will happen - is that LLM scrapers will just start to ignore the instructions to go away once it becomes clear that no content creators want their work to be scraped for nothing in return. So 'AI' users will continue to get free stuff, but at the expense of everyone they stole from.
The API is the other part of the funnel. It's been quite revenue generating from the beginning. Enshittification is more likely to happen to companies with terrible ARPU, like Reddit or X.
Then again Sam Altman was on Reddit board, and during that time, defended that it was fine for Reddit to lose money, because they still had plenty of money in the bank.