Seems like that's the idea behind the Brave browser [0]. If I could have some tool that I could put funds into and then frictionlessly pay publishers as I read articles (preferably in a way that didn't let my spending habits be uniquely tracked everywhere) then I would sign up in a heartbeat: I do want to support content producers, don't really want to sign up for n different accounts to do so.

[0]: https://www.brave.com/