Everything you say makes sense. But can you help me understand why this doesn't also apply to the LLM service I use today? Doesn't that service, in effect, makes a "micropayment" to the LLM providers every time I make a query? Is the key difference that there are only a small-ish number of LLM providers? (Not doubting, just interested!)

As mentioned above, it's not a micropayment. It's just a payment. You can transact in whatever amounts you want, and backend systems will bump the numbers around just fine, even for fractions of a cent. Hell, that's how interest and currency exchange settle out. The LLM provider runs a meter. The meter tallies your activity, wraps it in a transaction, hands it to the backend, backend talks to other banks/payment gateways, an ACH happens, done. That isn't a "micropayment". That's just a payment. In fact, if you pay attention, some of the biggest winners in tech, namely cloud providers or AI providers, are as darling as they are because they figured out how to turn everyday compute tasks into billable transactions. We're exceptionally good at tracking the build up of value, even if your atomic unit of transaction is a thousandth of a cent, but x however many million customers you have, it quickly adds up.

Micropayments have always, as long as I've been in the industry, implied a level of disintermediation on the behalf of sender/receiver. The chance to have that kind of utility died September 11th, 2001, when the U.S. and western world suddenly got the bright idea that the only way to protect themselves from terrorists was to modify the system to be able to surveil everybody l, all at once. Bringing us to a codger explaining why P2P micropayments are pretty much a pipedream in the finance world as she is legally practiced.

Not too interested in debating the semantics of "micropayment", but it sounds like if we swap in "news sites" in place of "LLM providers" everything should still still be possible? Consumers could pay tiny amounts of money for individual articles?

You already can with traditional finance. The only thing stopping that from being the case is that the news orgs don't want to sell their product that way, and you can't force them to. That's kind of a them thing. They get to dictate their terms, you don't like them, that's fine. Their answer would be you aren't their target demographic. Besides which, do you really want to create an arrangement by which someone sneaking in an XSS driven script will drive your browser to visit their entire catalog, and piping the content to /dev/null or similar, you getting charged for every GET?

The technical possibility is there. The desire to operate the business that way is not. You're a victim of the conspicuously absent feature implementation, and all I can say is... Well... Welcome to the club. Here's your "Fuck MBAs" hat, and an Occupy Wall Street T-Shirt, because the perpetrators inflicting your suffering all pretty much as a whole wear suits.