Dev here. There are at least 12 servers at the moment, but they're divided between several regions so you're probably only seeing the IPs of the servers in you

Dev here. There are at least 12 servers at the moment, but they're divided between several regions so you're probably only seeing the IPs of the servers in your region. Each server also has several instances of the game, it creates more as demand rises. The most used resource on the servers is CPU.