Klepar
Readers do have some influence about the direction of the site.
There are only 2 realistic options so that why I only pick 2.
Paywall similar to what Qidian is doing in China.
Freemium, which a lot of content services in the West are doing (Crunchyroll, Spotify, Hulu, Funimation, Viki, Dramafever, NY Times, Wattpad, Royalroadl etc...)
Paywall: $0.04 per chapter seem about right. 4 spirit stones kinda gives that away. In China, it is about $0.02 per chapter so internationally, it will be a bit more expensive. Munpia in South Korea charges $0.09 per chapter. So my best educated guess with a potential paywall is $0.04 per chapter.
Freemium: $5.99 seem about right. Wattpad charges $5.99 a month to skip ad. Crunchyroll charges $6.95 a month to skip ad; watch 1 week ahead. So my best educated guess for a potential premium service for www.webnovel.com will be $5.99 to skip ads, read several chapters ahead of ad-supported free users, get more power stones.