I would like to see the option that lets people share the episodes that weren’t published yet. Right now, this system works only with three first episodes, when the whole story isn’t published. There are many solutions to implement it, maybe there could be a little link “share unpublished chapter” and then, after choosing the chapter number, episode generates the unique link that works only once on the device that uses it first. It could be combined with a marking / comment system.
This solution would let people easily proofread chapters and test if everything works okay and get feedback before releasing. It would also work with their gain system, with options they chose before.