JWPark
Why wouldn't it benefit the authors? Chinese authors get a cut of the revenue that QI makes. The more money that QI makes, the more money the authors will make.
As for how to divide the profit, it is not that complicated. Using a hypothetical example of $300,000 monthly pool to be divided among the authors with the authors getting a share based on how many chapters are read
Author A: get $2,000 that month (from having 100,000 chapters of his/her novel read that month)
Author Z: get $4,000 that month (from having 200,000 chapters of his/her novel read that month)
So popular authors get paid more.
As for translators, many readers donate to the translators they like through Patreon to show support, not necessary for the advanced chapters. Even if QI has advanced chapters for Premium members, many donators would still continue to donate to the translator since they want to support the translators.
In addition, translators could post more advanced chapters compare to webnovel.com
For example, if webnovel.com is 7 chapters ahead for Premium members, translators could reward their donators with 12 chapters ahead.