Ideally the model would be run locally in the browser, so the author isn't paying whatever they're paying. But the web standards to do complicated stuff locally aren't there yet and probably will never be.

That's not a practical answer but it's my two cents.

I wish I could give him two cents without having to try. HTTP status 402 with micropayments or something needs to become a thing. The platforms do it... (subs, tips, donations, rewards etc etc.) Why can't the web.

All you need is WASM surely? I expect this model is too big to download & run on local CPUs though.