This is basically just how we want to do micro payments. I think coinbase recently introduced a library for the same using cryptocurrency and the 402 status code. In fact yea it's called x402. https://github.com/coinbase/x402
This should be the standard business model on the web, instead of the advertising middlemen that have corrupted all our media, and the adtech that exploits our data in perpetuity. All of which is also serving to spread propaganda, corrupt democratic processes, and cause the sociopolitical unrest we've seen in the last decade+. I hope that decades from now we can accept how insidious all of this is, and prosecute and…
People with content will still want to maximize their money. You'll get all the same bullshit dark patterns on sites supported by microtransactions as you will ad supported. Stories will be split up into multiple individual pages, each requiring a microtransaction. Even getting past a landing page will require multiple click throughs each with another transaction. There will also be nothing preventing sites from bait and switch schemes where the link exposed to crawlers doesn't contain the expected content.
Without extensive support for micro-refunds and micro-customer service and micro-consumer protections, microtransactions on the web will most likely lead to more abusive bullshit. Automated integrations with browsers will be exploited.