I think it's trying to show relative scale, not individual people. A source and scale would have been nice though. 

 Right. But at the same time, there’s many many 3rd party Bluesky developers making tons of cool things. Some even based on ATProto and completely separate from Bluesky. 

 Maybe not as many as Nostr, which could be their point. But I don't know because there's no scale or source in this image anyway. I didn't watch the video this was taken from. I have no opinion one way or the other without the necessary data. 

 yeah, like... seems like the "devs" here is less "developers" and more "spec writers".
having spent way too much time digging through the countless AP projects, I can safely vouch that ActivityPub has a boatload more than just 4 devs, but - if I remember correctly - the original spec was written mostly by 4 people(?)

either way, this slide is wack 

 Yeah it’s off.