Bluesky: You are immediately and automatically welcomed into the warm embrace of an algorithm that entices you into a parasocial relationship with the synthetic community it has created.
Mastodon: If you’re lucky you’ll stumble across a warm welcome for new users explaining how posts are called toots here, likes are called florps, and our version of Grok is called Garfiald.
That’s not how it was as of yesterday when I signed up just to see what all the fuss was about. (I don’t think I’ll be participating.)