Do not change the launch rate of normal chapters (1 ~ 2 chapters or more per day as usual), leave this for the translator to use as a resource for 'power stones'.
Add the special chapters, which can be unlocked with a monthly / annual subscription or spiritual stones (only purchased spiritual stones, free spiritual stones should be used only in normal chapters). The number of special chapters can be a fixed number or not, it can be based on how much SS you are willing to spend.
The number of special chapters can be fixed for Subscription. Example:
Subscription level one: 2 extra chapters beyond the normal chapters.
Subscription level two: 4 extra chapters beyond the normal chapters.
Subscription level three: 6 extra chapters beyond the normal chapters.
or they can be 'pay to read' with the spiritual stones. Example:
10 Spiritual stones to unlock 1 chapter after the last normal chapter release.
20 spiritual stones to unlock 2 chapters after the last normal chapter release.
30 spiritual stones to unlock 3 chapters after the last normal chapter release.
Remembering that the spiritual stones used to unlock special chapters has to be purchased. We can call them "middle tier spiritual stone".
**The number of SS I have used is just an example.
Add extra functions to spend the free spiritual stones, thus possibly increasing the number of people watching Ads in the normal chapters
You will earn your money from Subscription/purchase of spiritual stones
You will possibly make more money from Ads
And most importantly, you will not lose readers to the 23923 sites that provide free chapters
