A lot of the accounts you follow and interact with on here are not Mastodon accounts!
For example, @theatticdwellers is a PeerTube account, @Iancylkowski is a Pixelfed account, @rstv is an OwnCast account.
There are dozens of different server types on here, not just Mastodon servers. When you talk about this place, it's not enough to call it "Mastodon", because it's more than just that.
That's why people call this place "The Fediverse", because that name covers all server types.
@feditips Is there a way you can tell? The only clue I've had so far is if a post is waaaay longer than the average toot.
It's designed to be seamless so that you don't notice if posts are from other server types, but there is a way of checking!
If you go to a post's original page, it will open it on the account's own server's website. The server's type will be obvious from the website's layout, logos etc.
Here's how to open original pages:
https://fedi.tips/what-are-original-pages-in-mastodon/
You can try this on the accounts I linked to in the first post of this thread, they will all open on non-Mastodon server websites.
@feditips some clients show that information on the profile page, so it's one click away (attached screenshot from Fedilab). Also akkoma's (and I believe calckey's) default web frontends display an icon of the software next to every toot.
@lyssachiavari
Yes, Friendica also shows the poster's original server type with a little logo.