I read what I want to read, and don't read what I don't want to read. I buy coins to read authors and novels I want to support, and use fast passes to find new things to read, or if a story's quality isn't to the point that I want to spend real money on it, but it has something good going for it.
Making a fast pass book-specific or genre-specific isn't going to make me read things I'm not interested in reading, it'll just make me read fewer new or questionable novels.
So if webnovel's goal was to make people read less, good work!