Well, here in Canada they're mostly fiber also -- but it still works. See, for example, https://www.teksavvy.com/ and https://www.start.ca/ ... "TPIA" is what they're called.

In looking them up, I stumbled on mailing lists for TPIAs hosted by Torix. Realised at that point that TPIAs have a lot in common with Canadian IXPs -- both put pressure on prices from Canadian ISPs, TIPAs by consumers and IXPs from businesses/services aghast at how much certain folks charge. See https://cira.ca/sites/default/files/cira-ixp-overview-web.pd... for more on IXPs. I wonder if there's a book on this somewhere, or what ISPs think. Rogers Cable peers with Torix, so it's not exclusively smaller players, in fact I'd say it's the everybody-but-telcos club but I'm sure telcos and US players are welcome if they cared to... (let's pretend they simply are unaware of the ahem, savings...)