"It's an archiving service" doesn't make this drama any more interesting, and, again, it's weird that it keeps happening here. Just stop paying for it if it isn't working for you, and stop trying to use HN to take people own a peg.
Also: is exporting your entire archive (not the bookmarks, but the archived copies) even a feature Pinboard says it has? That's news to me.
Yes, it's in Settings>Backup>Archive Backup
I think to remember that idlewords even recommended to do it once in a while. Should I not get my archive backup I guess I can still reconstruct most of it from the Internet Archive. It would just be nice if it worked (but my 5-year subscription will run out soon now anyway).