Apparently this happened before in Jan 2022, and the same IP holds (https://news.ycombinator.com/item?id=29873350) - I was able to snag a backup of my bookmarks by updating `/etc/hosts` to include `64.62.134.190 pinboard.in`.
Thanks! Just are reminder... For those using DoH, this is not going to help. If you use DoH in Firefox you'll have to edit network.trr.excluded-domains in about:config to include pinboard.in and do the /etc/hosts edit too.