The mods have already made it perfectly clear[0] that paywalled articles are acceptable, though. This isn't a subject which is apparently up for debate - flagging paywalled articles is an abuse of flagging, abuse of flagging will lead to loss of flagging rights, and complaining about paywalled articles is off topic, and off topic discussion gets pruned and voted down.
If you don't like that an article is paywalled, provide a workaround link (which many such sites have, so they can still get SEO from the article) or just don't comment on that article.
[0]https://news.ycombinator.com/item?id=10178989