I'm sure you're aware but it's worth pointing out that you will lose all your cache hit discounts with some providers. The next turn will incur the cost of the whole trajectory billed at fresh input token rates.
As an aside, 95 pages into the system card for Claude Opus 4.6, Anthropic acknowledges that they have disabled prompt prefill.
It's mostly the US and a few other small markets that even have millimeter wave 5G NR. This is mostly due to the fact that FCC had not wound down analog broadcasts in time, and mmWave/FR2 was the only way to do 5G in the US initially, as lower C-band were not freed up until 2021. Deployments of mmWave exist solely due to the sunk cost of existing equipment and narrow use-cases like stadiums and concerts.
The article predates our current reality where C-band (3.5GHz) is available for 5G
There is an A16z company that does exactly this, called yupp.ai. They need genuine labelling/feedback in return, but you get to either spend credits on expensive APIs or cash out. Likewise, openrouter has free endpoints from some providers who will retain your sessions for training.
You could also check the world catalog to see if a library near you offers the ebook for lending. Universities typically allow the general public to walk in and look at books without registration.
I don't think you realize that sale proceeds never reach authors or reviewers. Journals would look like tabloids if they did.
Private corporations even pay for open access because the addressable market for such a product in dollars will be a pittance compared to whatever it cost them to research the product.
Regardless, LLM training has a different notion about the public domain, so trade secrets are what you're looking for - licensing isn't going to stop anyone.