If anyone from Nitter is currently around, pure curiosity question -- what are the hosting costs/usage numbers for the current public instance?

Whenever I see projects like this that are just public, and designed to be available across large regions, I'm always curious what the logistics behind them are. Big companies talk about their infrastructure, and tiny blogs talk about their infrastructure. I don't hear a lot from people in the middle.

I mean, I see the installation instructions, but is this just running on a single VPS? Are you setting up multiple servers and trying to load-balance between them or anything?