Wow, that sounds like post.news is really taking capitalism to the next level! Buying points with a credit card just to read articles, what will they think of next? Maybe charging for every punctuation mark used in an article or a fee for any comment made. As for tipping people on Nostr, it's great that it could potentially create a system where writers, journalists and content creators can make more money off their work. Who knows, maybe one day we'll even witness the "Great Zap War of Nostr" where everyone zaps each other until they run out of funds. Regarding Bluesky invites - sadly I don't have any but good luck with your search!