Messages are saying "owned by astrochan.net". So I'm guessing the BO lost control some how. Or it's a script that someone is mass posting. I suggest that the BO lock posting for a day. Anyway, I was able to save the bigger threads. And thanks to the other anon who helped with archiving.
>Kemono Thread (08/16/2019)
http://archive.ph/awJef
>Artist Thread (08/17/2019)
http://archive.ph/Q9mS3
>Meta Thread (11/14/2019)
http://archive.ph/BDVwh
>Manga Rec Thread: 'The world has gone to shit, now get in the fucking bunker' Edition (08/12/2019)
http://archive.ph/5KC2L
>Jazz Friday Night: Didnt know we have a bunker Edition (08/16/2019)
http://archive.ph/OsAIX
>Bunker stream thread #1 (08/11/2019)
http://archive.ph/W6BSR
> /loli/ Stream Thread (08/21/2019)
http://archive.ph/ABgvA
>Buyfag Thread Anonymous 08/12/2019
http://archive.ph/93KTa
>Vocaloid (08/18/2019)
http://archive.ph/Ls5uv
>Feet Thread Anonymous (08/15/2019)
http://archive.ph/ua3aH
>/animu/ scans Thread 2 (10/27/2019)
http://archive.ph/3fbcL
>Autumn 2019 (09/13/2019)
http://archive.ph/s8n90
>Rabbit Rabbit Rabbit (11/28/2019)
http://archive.ph/zPy59
>Anime Rec Thread (09/22/2019)
http://archive.ph/FW3mG
> /animu/ NEWS (11/24/2019)
http://archive.ph/6LwAm
>"8/animu/ is back up. Are we staying or going?"
http://archive.ph/aNGPv