LittleSleepyFox let’s compare it to an equivalent service from Japan: Shonen Jump. For $2 a month, you get access to the back catalog of manga from most of SJ and it’s popular series. They are also continually adding new series and currently releasing in Japan series. There are limitations, but reasonable in my opinion, of reading 100 chapters a day. I think this is comparable. Otherwise, $25 is just whack. I don’t even pay $25 for Spotify and Netflix combined!
Obviously, Webnovel should use different limits/counts. But I think that their sub service should not exceed $5-7. The manga service has completed series and new/ongoing series. It’s fully translated and professionally edited. Qidian is using fan translators and editors.