Here's another case to show that you don't always know what you're getting -- and might have a legitimate reason to return an ebook. There is a popular indie author who put together a company and a team of approved ghostwriters and created a known brand. Under this pen name, I believe a couple of hundred books were published.
But then, it got messy. There was a dispute with another person who claimed that he was the real creator of the pen name and various series. So the books stopped coming out because of court cases. Then, one of the claimants said they had the rights again and started promising new books. Some of them did appear on Amazon and in other stores, although some appeared and then were removed. Like I said, a mess.
Another mess ensued. People who owned the original books said they disappeared from the Kindles and even their libraries.
(Some still had the books in their libraries, while some did not.) At least some were able to get refunds for the books they can no longer access.
Most fans are not that "deep" in this. So they could lose access to their books and not know why. Or they could wind up buying ebooks they think are by the author (OK, the team) they once loved, only to end up buying books by someone the author did not hire or approve. Would they be eligible for a refund?