I read only non-fiction and sometimes I have to read through 20-40% of the book to decide whether I want to finish it. I think many people do same with fiction(

I read only non-fiction and sometimes I have to read through 20-40% of the book to decide whether I want to finish it. I think many people do same with fiction(especially fan-fiction). So there's niche for these people too. Many of these people are also bad at finishing books and such services will unfortunately encourage this behavior!