Hi,
I'm not sure which forum would work for this, or for solutions specific to each site.
OneBookShelf includes DrivethruRPG, Wargame Vault, DrivethruFiction, and related sites. I find them really useful, but sometimes the useful features can be frustrating too.
They sell a lot of games and fiction and related material. They often sell charity bundles. They also pair up with Bundle of Holding who always sell charity bundles. In that case, the downloads from each source will mostly duplicate each other, but not always.
They mostly sell pdf files, with all the pdf-related headaches. So if you need to use k2pdfopt, splice, Ghostscript, or other tools to pre-process pdfs, you can't just import into Calibre.
The also have a very handy app, downloading files to their own library...
But file management solutions which rely on their own libraries can't help with that library. I end up doing a lot of fancy organizational work in that library, as well as importing into the Calibre library. As long as I refresh often, it doesn't have trouble with adding pre-processed versions of the pdfs alongside the originals, moving the files into appropriate subfolders, etc.
See also the discussion here:
https://www.mobileread.com/forums/sh....php?p=3563457
What solutions have you found to simplify file organization when sites set up their own libraries?