Heads up, aside from PDFs endchan appears to support both 7z and zip files for upload. With these compressed archives, in effect, any ebook can be uploaded.
8chan had too many other PDF boards scattered about. I would like to point people here exclusively instead of setting up yet another upload board, as long as we can post more than PDFs. However, archive blobs come with some potentially serious self evident problems. I was wondering if you have any insight/suggestions/ideas on this?
For example, an additional board rule may be needed, something like: "Any encrypted archive uploads must be easily decryptable by the board moderators, and must only contain recognizable ebook files. Otherwise they will be summarily deleted, with bans placed at the moderators discretion."
