If you see this code
https://gitlab.com/magnolia1234/bypass-paywalls-chrome-clean...
It is a 5000 piece of if else conditions where the author has handled each website separately.
The author is few techniques like
- redirecting to amp websites / mobile websites
- checking google cache for the mobile data
- removing paywall modals which might be coming
Just from the look of the couple of implementations, i don't think it will be able to render server side paywalls.
https://pastes.io/1sp8o1nsxm
Look at the implementation for medium.com, it is just about manipulating the dom. (I might be wrong :))