As a journalist, I defend the habit of sharing archive links.
Paywalls are a lazy and detrimental solution to a larger financial problem for media organizations. They limit the access to information to a specific subset of people, and let misinformation run wild and free.
So yes, sharing the article is important in this case. If there was, say, a 300$ per year global subscription to a 100 of publications, I'm also sure 90% of hacker news would buy it.