I would add, especially in the case of Twitter, active users that aren't bots, OF advertisers, scammers, and the like. A LOT of Twitter feels like machines talking to each other.
The article is about enjoying the one more than the other.
The author plainly doesn't like ol' Musky, but there isn't really a winner vs loser distinction made in the article. To the extent there is, it gives the winner label to other services, not Bluesky.
Sadly it’s really hard to distinguish users and bots (on both platforms) - or even impossible. Maybe in the future there is just a social network populated with bots…
I would challenge you to surface metrics that better measure the utility of a vibrant online discussion platform. For example, how many users does HN have?
More interesting would be active users especially those who follow each mutually and engage with each other