They have an FAQ and a blog where they go into a fair bit of technical detail, but basically they do cookie isolation and support only some javascript, and for hard blocks they get stuff from AMP.
There are actually plugins for browsers that can do similar stuff. Both github and gitlab have been going after the repos though. There is an active repo here https://gitflic.ru/project/magnolia1234/bypass-paywalls-chrome-clean
They have an FAQ and a blog where they go into a fair bit of technical detail, but basically they do cookie isolation and support only some javascript, and for hard blocks they get stuff from AMP.
https://blog.archive.today/post/675805841411178496/how-does-archive-bypass-hard-paywalls-for
https://blog.archive.today/post/678436941726990336/there-are-at-least-two-use-cases-for-your-service
There are actually plugins for browsers that can do similar stuff. Both github and gitlab have been going after the repos though. There is an active repo here https://gitflic.ru/project/magnolia1234/bypass-paywalls-chrome-clean
neat