>>3Oh, I didn't check that the ID search works, my bad. Yet the URL search doesn't, even though that was the primary author id on kemono. Maybe uou can add it to the search at least? I am speaking from the webnovel reader perspective, i.e. RhaegarRRL is the authors handle on Royalroad, which he is mostly known for, and is his patreon URL, yet now on seiso you can only search him by G. Harthane, his name on patreon.
As for my #4, what you've described is exactly how it is supposed to work, but it doesn't, here is what it does instead:
https://seiso.party/importer/status/1354008e