Re paywalls: if there's a workaround, it's ok. Users usually post workarounds in the thread. This is in the FAQ at https://news.ycombinator.com/newsfaq.html and there's more explanation here:
Well Mr. Dang, we've got a new edge case for you lol: An article with substantive content before the paywall, but that doesn't have any workarounds for the rest of the article. I would love to be proven wrong, but AFAICT we'd need a subscriber to this particular person's Substack to host a version for us.
https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...
https://news.ycombinator.com/item?id=10178989
The converse is also true: if there's not a workaround, it's not ok.