Why isn't this in the Chrome store? There's other extensions that integrate with 12ft.io in the Chrome store (e.g. https://chrome.google.com/webstore/detail/12ft-free/ljgfopbn...) so there's no rules against this kind of thing.

So I wonder what this extension in particular is doing that Google wouldn't approve of.

...also 12ft.io already does this for almost every paywalled site.