I actually stayed away from Amazon's Kindle store for years — not because of sideloading but because I'd have to convert the & ^ % $ # KIndle files into epubs. (madgeniusclub.com)
Was there a way to «de-bloat» it and then sell 2 separate kindle files on your website: 1 for Kindle 3 and one for the Fire and beyond? (pigsgourdsandwikis.com)
kfx - zip file when remove drm from kfx kindle file, kfx - zip is zip file that user unzip it to a folder, that folder is nodrm kfx ebook. (ebook-converter.com)