That's not what OP said.<p>Sites displayed ads. Then they decided, or found, that ads didn't bring in enough revenue, so they added paywalls.<p>Paywalls are annoying, they don't scale, and they break the promise of an open web. All that is sad.
The web is still open, anyone can post anything they want and anyone can see it (in the US, at least).<p>An open web, to me, does not imply access to all websites.
People still have to be paid. or they won't be paid and you just get different flavors of slop.