This place is brand-new. And it has no established vibe yet, really. It's totally wide open. So, when we meet the people involved in it, it starts building that vibe. I think that's part of it.
Also, this place could still fail. It needs new people to survive, since everything revolves around content creation. So it's important to welcome new people in.
Finally, I think people didn't know what else to do. An introduction is the starting point for every human relationship.
That's my sense of it.