1) and 3) would be better solved, I think, by appropriate text tags. And tags are also great when integrated with the site search, or even the native search/fin

1) and 3) would be better solved, I think, by appropriate text tags. And tags are also great when integrated with the site search, or even the native search/find in the browser. On some subs of reddit for example, paywalled articles are announced by a simple flair.