The code reads: moderate your own instance however you like.

Defederation is one-way. An instance you defederated with still has access to your instances posts.

People who speak English as a second language are able to engage with a platform in which the majority of users speak English. People who only speak English or that and their local language are unable to engage with a platform where the language used is not their own or English.

More people are able to communicate with a shared language than with languages which are not mutually understood.

One other factor contributes: the U.S. has a large population which shares both a language and some culture. While multiple other countries may share languages, the populations which share a similar level of culture are smaller.

Then you have posts on social media being ranked in some way by engagement. One post may be relatable to 100k people, and five other posts are relatable to 20k each. The single post is ranked higher.

The internet is not something you just dump something on.

Why does that person need to have an actual account on Threads?

They don’t. They just use their existing Instagram account.

It’s literally the same account you already have.

Yeah it’s a bit self-selective. “Trying something unfamiliar” is roughly synonymous with “learning”. And people who treat learning as a hobby tend to share a vibe as they say.

These days even Minecraft mods are one click to install hundreds at a time. The average person can get by with nothing more than folders on their desktop.

That’s just how the internet works. Early adopters are those willing to try something unfamiliar.