The issue is that it's too difficult for readers to have a subscription to everything. Someone needs to come in and make a voluntary content network. Add the extension to your browser and it tracks which sites you spend your time on. Content providers get a payout at the end of the month reflecting the value that readers/subscribers derived that month. If someone without a subscription accesses the page, it will be a) monetized by ads or b) available under a limited free readership ceiling, like WSJ/NYT do (content providers could potentially be incentivized with a larger portion of proceeds to choose this option).

I know there are a couple of people working on something similar to this on HN, because I've mentioned something like it a few times and they've replied saying they're working on it. ;) There was one in particular that I was following, but I remember when they launched there was a fatal flaw in their model (maybe it was bitcoin only? I don't remember). I don't recall the name now.