Mastodon is decentralised.
I have 45,465 followers on my single-person instance.
Of those, 13,180 are on mastodon.social.
So roughly 30% of my followers are on mastodon.social.
Also, I follow 11,392 people.
Of those, 1,864 are on mastodon.social.
If mastodon.social blocks my instance, I lose 30% of my followers and I’m forced to stop following 1,864 people.
If my instance blocks mastodon.social, I lose 30% of my followers and I’m forced to stop following 1,864 people.
Mastodon is decentralised.