Here are various links that describe #1 for those unaware, but not in much more detail unfortunately
https://www.fastcompany.com/90817452/can-mastodon-be-a-twitter-refuge-for-marginalized-groups?ref=privacy.thenexus.today
https://dotart.blog/welshpixie/defense-of-the-bad-space
https://privacy.thenexus.today/mastodon-a-partial-history/#playvicioussocial
https://fossacademic.tech/2022/12/24/Playvicous-Christmas.html