Fair enough, but there are valid reasons to object to paywalled content being posted to a news aggregator like HN other than wanting everything free. Content not available for everyone to read leads to low quality conversations dominated by complaints about the paywall. Unfortunately, people still complain even when there is a workaround. Showing partial content then asking for payment to read the rest seems like a dishonest tactic, and it kind of is.
If people don't want to pay for anything on principle, then there's not much sites can do about that either. Paywalls are a better option than advertising but sites are still probably going to lose a lot of revenue either way.