Many newer Kindle models allow you to link your Kindle and Goodreads accounts so that the reading progress on your Kindle shows up in Goodreads. This was never the case for my old Kindle 4, and if you jailbreak a newer Kindle and read using KOReader, you lose the benefits of this native integration. Thankfully, I was able to use a KOReader plugin to get my reading stats to sync with Goodreads.