An independent author faces one structural decision that shapes everything afterwards: whether to sell through every retailer or to commit to one in exchange for its subscription programme. The choice is not obvious in either direction.
Exclusivity buys access to subscription readers
Major retailers operate subscription services where readers pay a monthly fee and read without buying individual titles. Authors are compensated from a shared pool based on pages read.
Access to that pool generally requires committing the ebook to that retailer alone for a fixed term, renewed automatically unless the author opts out.
For an unknown author the appeal is real, because subscription readers take risks on unfamiliar names that paying customers will not.
Exclusive titles are also promoted more heavily inside that retailer's own recommendation systems, which is a meaningful advantage for a book nobody is searching for by name.
Wide release spreads the risk
Selling through every store means no single company's decisions can remove an author's income overnight, and it builds readerships in territories where the dominant retailer is a different one.
Library systems and international markets are reachable this way and largely closed to exclusive titles.
The cost is that each individual store contributes a smaller share, and none of them promotes the book with the intensity a subscription programme can.
The revenue mechanisms are not comparable
A sale pays a royalty on a known price. A subscription read pays from a pool whose value per page is set after the fact and varies month to month.
That makes exclusive income harder to forecast, and it means an author's earnings can move without anything about their books changing.
Long books earn more per borrow than short ones under a page-based system, which quietly influences what authors in that programme choose to write.
Genre changes the answer
Categories with heavy subscription readership, particularly fast-moving genre fiction, often perform better under exclusivity because that is where their readers are.
Non-fiction, literary work and anything with library or educational demand usually does better sold widely.
Print and audio editions sit outside the exclusivity requirement in most cases, so the decision applies only to the ebook rather than to an author's whole output.
The decision is reversible but slow
Authors do move between the two, and many test one approach on a series and the opposite on another.
Rebuilding on other stores takes months, because ranking and visibility on each retailer accumulate from sales history that an exclusive title never had a chance to build.
That lag is the real cost of the decision, and it is why authors tend to commit to one approach for a whole series rather than switching mid-sequence.