Once O'Reilly stopped selling PDFs and shifted their focus into subscription, the needs of this kind of tools have grown. Their app and site is OK to skim throu

Once O'Reilly stopped selling PDFs and shifted their focus into subscription, the needs of this kind of tools have grown. Their app and site is OK to skim through books, bad not good enough for serious reading. I hope they provide full-layout reading experience based on their PDF. Then majority of users of this tool would just come back. I wonder how author payment works with the subscription. If users of these tools don't count for that, that's a bummer - People who opt to download epub would be deeply engaged readers and should be counted. If there is a way to signal the readership by adding a book to the shelf, for example, it should be done by these tools as well.