A bit of a harsh article, but also decent from @Sarahp on the recent spam wave over on TechCrunch: https://techcrunch.com/2024/02/20/spam-attack-on-twitter-x-rival-mastodon-highlights-fediverse-vulnerabilities/
I want to echo what Renaud says: “building federated software is hard”, but also remind and add emphasis that all this is only possible by people donating money to the projects to make them possible in the first place.