> how else would you have found it except "through links from similar small websites"?

By browsing Web-Directories such as DMOZ/ODP, mainly. Albeit that's really a late-90s and 2000s thing. We should go back to that kind of curation effort. It would be more of a challenge for politically-sensitive stuff (the Internet overall is a lot more politicized and less free-speech-friendly than it used to be) but for most uncontroversial stuff it would work well enough.

(And no, Wikipedia is not a true replacement even though it might be the closest thing to one we happen to have. They purposefully keep external links to a minimum, for sensible reasons - they're building an encyclopedia, not a Web directory.)

I'm sure there are lists like these and we just don't know about them.