Earlier quoted context omitted.
> Usenet, I think, has a strong hierarchy structure rather than just being a 'web', although it is that as well. So if the takedown order is directed at a server in high enough position, it is essentially removes it from all of Usenet - and it's not just takedown orders, but actors with the ability to remove content unilaterally. There were some sites that had bigger pipes and more tolerance for storage requirements…
> but there wasn't any hierarchy as such. My memory was that smaller ISPs would peer from the larger ISPs, that's the type of hierarchy I was thinking of. Maybe not in design, but in practice.
http://usenet.trigofacile.com/hierarchies/index.py?status=pr... and https://web.archive.org/web/20220815151921/http://bofh.taron...
Peering to larger ISPs was more of a matter of convince and that is often part of a business arrangement for a company and a client.
Another use of usenet back in the day SGI had its bug tracker write out to news. A Usenet reader was one of the preferred interfaces to creating and commenting on bugs internally. Furthermore, exporting the bug tracking system to a partner was "simply" a matter of adding them to the feed and making sure that they didn't route bugs from their server to others.
The point is that the "little to big to bigger" was just convince - not code or enforced in any way.
Many university CS departments would peer with each other back in the day. Recall that news was originally across UUCP - the same mechanism that email was sent. If you wanted to send email to someone at another university you'd much rather have them as a peer so that it was just one hop rather than going some other route that could take days to get there. And so various hub and spokes evolved. Everything in the University of Wisconsin peered with Madison. Everything in Illinois peered with UIUC and Madison peered with UIUC. Note the word 'peer'.
And if UW Whitewater wanted to get their email to UIC faster, then they would peer too. Would UW Madison complain that it's not going through them? Not at all! It meant their phone bills would be less.