After this most recent update, I'm forced to stop using your app. I've paid forty dollars for an incomplete book, and now I'm being told the only way i can keep reading after already paying for premium. Is pay even more? That is an incredibly messed up business model, that effectively tells people like me to go screw ourselves. It was fun while it lasted. 
I've spent 40$ on an incomplete book...
I feel ya broski. I had webnovel before this new stone system thing was even here and it was nice. Reading books for free with no worries, but they switched it up. There are ways to get free spirit stones if that's what you need. But the whole spending 40$ on the book is kind of your fault. Not saying that it is kind of a messed up system. But yeah.