Both from safety and volume perspectives, I’d imagine. Openness has value.

Yes Lobste.rs is great but much more limited in conversational scope. I don’t think the content on each site is directly comparable. The sites are not equal in audience and intention. For example, Lobste.rs doesn’t allow rampant evangelism or want to attract start-ups and thus doesn’t attract a more “spammy” crowd.

Lobste.rs has an invite based system however.