Maybe it is? Idk, I'm no ethicist so I wouldn't be able to justify it. But is it any different than using the web link to get a google redirect when you didn't really come from google? Or using incognito mode? Perhaps the better discussion is about how a community forum handles articles which only a subset of people can access.
It's one thing to find a loophole in their paywall to view their content on their site. It seems to me that it's quite another to scrape their content and serve it up somewhere else in its entirety.
Outline is just the new readability. I'm not sure they're even aware that they're serving paywalled content. To me, the end user, the effect is the same. They're both just loopholes.
