From GoodEReader website:
Amazon is launching a new system the iOS Kindle app called Kindle Vella, in the next few months. It is a new way for authors to share serialized stories with readers, one chapter at a time. Authors can self-publish Kindle Vella stories in a serial format, one short 600–5,000-word episode at a time, using the same Kindle Direct Publishing platform that have always used in the past.
Kindle Vella stories will be able to be purchased right on the iOS app, using tokens. The first few episodes of every story will be free so that readers have a chance to check out a new story and see if they like it. Readers will then purchase and redeem tokens to unlock subsequent episodes. The number of tokens required to unlock an episode is determined by the length of the episode. Amazon will have different bundle options for readers and will be sharing the details soon.
